Yes and make sure you use the promo code EMCBCBKDB for $15 off .
I'd recommend against cheaping out on a G31 mobo, any decent P35/P45 should be good though. If you don't mind open box, something like this would be awesome GIGABYTE GA-EP35-DS3L
The Antec Basiq is a pretty mediocre psu, I'd recommend something a bit higher quality. The VX550 is great but you could probably get by with something cheaper (haha sorry I don't have any in mind ). However, at the moment the 650TX is only $2 more on Newegg so you might as well get that.
As for the heatsink, Xigmatek S1283 or OCZ Vendetta 2 or Sunbeam Core Contact. They're all pretty much the same, just get the cheapest . I'm not sure about the other 2 but with the Xigmatek, you'll want to buy the retention bracket, link.
Also, no reason to buy XP at this point, go for Vista 64-bit