I'm gonna have to agree with the other guy. Save yourself a chunk of money buy going with the 955 ($115). You can over clock the BE up to higher than the 965's speed and save yourself some cash.
I've heard great things about the Corsair 600T and I'm also looking to buy a new case, but the 600Ts are just a bit high for my price range. If you can get there with the saved money from the processor, I'd go for that.
Gaming builds don't really need nor benefit from having more than 4GB of RAM, so unless you do other things which justify more than 4GB I would suggest saving yourself some money and just getting 4GB.
You won't be able to SLI with an AMD motherboard unless you do the driver hack or get a new 900 series chipset which would increase the price quite substantially. So you don't need a '750'W PSU and the Earthwatts EA750 is quite an old power supply by now, which doesn't perform as well as a lot of more modern units. It is also soon going to be replaced by a newer model - the Earthwatts Green EA-750 80Plus Bronze.
This would be a bit more appropriate for a build with a single graphics card:
Antec High Current Gamer HCG-520 80Plus Bronze $69 ($3 shipping) http://www.newegg.com/Product/Product.aspx?Item=N82E168...
But is basically the same price as the XFX is after the rebate so you might prefer to go for that.
One of my favorites is the CM Storm Scout, going for 89.99 on Newegg.com right now. It has plenty of room to work in, does a good job with airflow, is practically tool-less, and has nice shiny lights I'm also a fan of the 4 usb ports up on top of the case.