AsRock Z77 Extreme4
ASUA P8Z77-V LK
Those are all the good gaming oriented boards, all roughly the same in terms of features. Get the one you like the look of and you wont make a bad decision.
Agree, double the RAM to 8GB.
Whats the budget on the monitor? If your after just a standard 1080p monitor, this will be fine.
ASUS VS248H-P Black 24". $160 ($20 rebate)http://www.newegg.com/Product/Product.aspx?Item=N82E16824236153
For a single card, a 650W unit will be plenty.
XFX Core 650W, 80+ Bronze. $80 ($20 rebate)http://www.newegg.com/Product/Product.aspx?Item=N82E16817207014
If your looking for dual Crossfire/SLI capability (which all the boards mentioned can handle), then get a 750W unit.