Matt, You are young enough that I would suggest you buy the cheapest, useable gear you can find. With as much as you have done so far, you must already know: it's not the hardware. I am sure you have seen guys with the money to buy Canon Cinema lens' and 5D bodies .. who end up shooting beautifully clear - Security Camera footage.
Hell, hook five Flips to your body ..make something the next guy hasn't thought of. Like music composition, It's not the brand of piano that will attract people to your music.
...but if the 5 or 7D (I have this one - for stills) is still at the top of your list, this is a great place to hang out: http://www.dvinfo.net/forum/