Hey Kzoo! I'm in Michigan too. We have a Michigan thread here on the forums in the Regional chat section. Drop by. Some of the riders have already did some meets. I plan on meeting most of them this coming season. Would be cool to get you in on the action too.
With that said, I work for a Michigan sports retailer. Summit Sports. We have shops all over Michigan (lower pen). We also own Don Thomas Sport Haus in downtown Birmingham. So I'm going to be absolutely shameless and say support a Michigan company if we carry the board you want! Don't worry about pricing, we guarantee our prices... on the Internet!
With that said, I just picked up the 2011 K2 Turbo Dream myself. I picked it up for almost the same reason as you. I already have a stick that can kill any hill here. I really wanted a rockered board so it can handle powder when I make trips out west, but still handle the hills here well. The TD did that.
K2 Turbo Dream Mens Snowboard 2011
The other boards that I was considering were:
Ride Machete: This is a more playful deck. It's a mid flex board so it was pretty versatile. I honestly didn't have a problem with stability with it. The only time I can see stability being an issue is one really steep and icey runs. This board is also going to be fun on powder. When I demoed it, we got a little bit of fresh. I hit a mellow run on the backside of Boyne (no one was riding this trail for some reason, maybe because it was too mellow) and it rode what little powder we had very nicely.
Ride Machete Snowboard 2011
Ride DH2: I would actually recommend this board over the Machete for you. It's a stiffer than the Machete and won't have any problems with stability. The reason I still included the Machete in my suggestion is in case you want a more playful board. The DH2 has a ton of pop and is going to be fun when you start hitting any type of jumps. It is also going to handle powder well. Actually, every board I'm going to recommend is going to excel in powder because of the rocker shapes.
Ride DH2 Mens Snowboard 2011
These next two boards are going to be the stiffest rides out of my recommendations. If you in fact are an intermediate level, you should be able to handle it. Because of their stiffness, they are going to be fast. The type of bases these have (sintered) also make it that much faster.
Lib Tech T-Rice: I almost got this board over the Turbo Dream. The only reason that I didn't is because this board would have replaced my current ride completely. I was looking for an addition rather than a replacement. This board absolutely rips. The magnetraction just utterly destroys any ice patch so it's really good for Michigan conditions. The C2 rocker shape is also one of my favorite hybrid rocker/camber designs. Rocker between the feet and camber through tip and tail. The graphics aren't exactly kid friendly though, but it is one of my favorite designs.
Lib Tech T. Rice Pro Model C2 BTX Snowboard 2011
This one was already on your list. Rossignol One Magtek. Rossi gets a bad rep in my opinion. Actually, it's pretty deserved. However, this particular board has gotten a complete makeover this year. This is my other favorite rocker/camber hybrid. It's actually reverse of the Lib Tech C2. Camber in between and rocker tip and tail. It also has Magnetraction so same story on ice. All I can say is that I had a lot of fun on this board.
Rossignol One Magtek Snowboard 2011
By the way, you're going to want a wide model board. With the T-Rice, the 161 is basically their version of the wide (it doesn't actually denote wide). You want a board waist width of at least 26cm (260mm). It will be around 2-3cm wider at the inserts where your feet are so keep that in mind.
I peg you around a 156-165cm length-wise all at wide. The most ideal in that range would be a 159 or 162 for a more versatile ride. If none of the recommendations float your boat, make sure you get something that is at least a medium flex. For your style, ideally you want something that is mid-stiff to stiff. Keep in mind that each brand is going to have their own flex rating. So Ride's 6 flex rating might be Lib Tech's 7. However, you will at the very least have a general idea of the flex. Also you want to make sure that you fall within the board's recommended weight range. Always use the manufacturer's weight scale. I've seen retailers list their own weight recommendations. I don't know about you, but I trust the source more than I do the middle man. Center of the weight range is best, but don't sweat it too much if you are on the lower end or higher end of the spectrum. Even if you are a few pounds outside of the scale, it's not the biggest deal. Generally speaking, under weight will mean the board will ride stiffer than it's intended flex. Over weight means the board will ride softer than it's intended flex.
There are going to be a shit ton of NeverSummer recommendations here. I've never ridden one, but people on these forums have me itching to try one very badly
. We don't carry it, but if you go with that I'm sure you'll love it.
Another shameless plug:
Buy any 2011 snowboard from Burton Snowboards, Burton Snowboard Boots, Burton Snowboard Bindings
(owned by Summit Sports) and you'll get free Skullcandy headphones. All of the boards I listed are over $400 so you'll get the LowRider over ear headphones. If you go with something under $400, you'll get in-ear buds. Internet only so make sure you order online instead of in-store for that deal. Free shipping too.
I look forward to shredding with you! Don't forget to visit the Michigan thread.