I suggest getting straight down to basics. Ditch the crossfire/SLI idea and cut down on your $250 dollar budget for a motherboard (way too much to spend on a mobo IMO). You can also tone down that PSU and if you go Intel, you can still go Quad, for cheaper, and even get the best performer
Another thing is, I know you're probably buying from NCIX because that shipping seems quite expensive. Go to DirectCanada.com, Canadacomputers.com or Infonec.com, they offer much better deals for shipping, some free, some flat-rate. btw, use shopbot.ca to help you out too.
I'm really not to sure exactly what you need to upgrade/transfer from your old build, or what exactly your situation is, but I've just replaced the parts from your initial post and noticed you were also interested in the 8800GT, here's what I suggest:
CPU: Q6600 ~$280
Mobo: IP35-E or DS3L ~$90-$100
GFX: 8800GT ~$250 (although, if you're patient enough, I strongly suggest waiting for the GTS G92 Revision, almost Ultra-performance for $300-$350 - coming December 3rd!)
PSU: Corsair VX550 ~$75 more than enough to run such a setup
Pocket the rest of the money and enjoy it on something else. Avoid the raptors and raid too, those are just not neccesary when you're a 17/18 year-old student on a budget. Remember if you want raid and SLI/crossfire, not only will you have to pay for a second hard drive and/or second video card, but your motherboard will also be more expensive, and IMO, it's not worth the investment for whatever increase in performance it may give. I'm on the same boat as you man. Just forget the gimmicks and think about the core parts and how you can balance them into a decent budget. and don't spend more than $100 on a case either, even less than that, like $80. Get an NZXT Alpha or Apollo, or an Antec 900, and as much tech-forums people suggest the Ballistix, we just don't always get the same deals here in Canada for some reason, some OCZ Plats can be extremely cheap, but if you find a deal on the Ballistix, take em for sure