the above build is going to be over 500 bucks easy, mostly anything you combo is going to put you over. so you'll have to cut down on the cpu a little bit, possibly mobo too. get something like this:
MOBO
CPU
GPU
PSU
RAM
in total this comes to $551.95 with shipping, without tax. Then you have mail in rebates in total of $55, making this setup cost $496.95 w/o tax. Not too shabby there. You could also cut some cash by getting a
5750 instead of a 5770. Total would drop to $516.95 with shipping w/o tax or rebates, $461.95 rebates included w/o tax. so it saves you 35 bucks to get a 5750, but i'd say the performance is worth it...so ask to borrow some cash from your parents and get something from the mobo, but that motherboard is very good and will last awhile in case you want to upgrade your cpu to a better quad core in the next couple years.