Well, it's all been ordered. And I went with the 750W corsair PSU listed in the OP. It's only $5 more expensive but it has free shipping so it ends up being the same price as the XFX I posted AND it also has a MIR so it might be a good deal for anyone in the market.

4GB ram has been ordered, as well as the heatsinks.

SCHWEET! If all goes well (fingers crossed) it should be up and running by the end of next week