Hmm,
I'd rather get it from Newegg or Tigerdirect. Also if your running XP just get 2gb of ram. XP can't utilize all 4gb.
For a gaming mobo I wouldn't go intel. I'd stick with a Gigabyte as your first board or maybe a Asus if you know what your doing. Surprisingly the best mid range board on the market for gaming is the Foxconn P35 Mars.
Also I would hold out 2 weeks for the 9800GTX to come out instead of getting the 8800GT. (It's only $380 for the 9800GTX which is cheap as hell!)
Also I recommend you get a raptor because it should fit your budget