I moved out here a little over a year ago from MI, and it has been awesome ever since.
Weekend driving does suck. You have to leave early to beat the traffic there, and then usually leave the mountain early (2pm-ish, especially on Sundays which are the worst) to beat the traffic on the way home. That gets very tiring as you're driving almost as much as you're riding.
If you could swing the 3-11:30pm shift, you could get a LOT of great riding in. Shit, if I had that schedule I'd probably ride 3-4x per week. Traffic during those mornings and on your way back into the city would be nothing compared to the weekend. You might be pretty damn tired by the end of the day (11:30pm, after being up since 7am or whenever you get up), but it'd be worth it.
I agree with Killz - live close to work. A quick commute every day for work and a longer drive for the days that you do go riding/hiking/biking/etc is much better than a long drive to work every day and a quicker drive to the mountains. Yea, it'd be awesome to be closer to the mountains... but at least for me, I work 5 days a week. Even if I wanted to snowboard way more, I doubt I'd ever get 5 days in during one week... so I'd rather make that 5 work day trips easier than the 2 or so days you'll have to drive to the mountains.
Snowboarding is obviously the reason you are on this forum, but there are so many other things to do in CO it is ridiculous. Hiking trails from Westminster are as close as Boulder and/or Littleton, or drive further to get to even better trails. Mountain biking same thing. Longboarding on paved hilly roads. Golfing. Just tons of stuff to do. Really the only thing I think that CO is missing compared to MI where I grew up, is the water. There are a couple man made lakes out here, but nothing like the thousands of inland MI lakes as well as the Great Lakes.