First Gaming Build, HELP!

[LBradford86]

I'm not an extreme gamer, or avid gamer for that matter, but I have some extra money and would love to have a nice mid-range gaming pc. I play WoW, Skyrim & GW2 mostly. I don't know much about building, so i've been going off of NewEgg reviews & TomsHardware recommendations. I've already ordered a few components because I got great deals on them, but outside of that I am wide open to any suggestions. And believe me, any help/suggestions would be very much appreciated. Here's what I have thus far;

MSI Twin Frozr GeForce GTX 660
2x WD 600 Gb Velociraptor HDD's, 10k RPM
Intel i5-3570k

Outside of that, I'm wide open to suggestions. Here's what I had picked out to complete my system. Please critique...

Case - NZXT Phantom 410 Mid Size
RAM - G.SKILL Ripjaws X Series 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1600
MoBo - 1 of these; (MSI Z77A-GD55, GIGABYTE GA-Z77X-UD3H, ASRock Z77 Extreme4-M) Something that might be of note, if I go with the MSI I get G.SKILL Ripjaws X Series 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1600 free with it.
PSU - I literally have no clue what size I would need with this build. Every PSU calculator i look at gives me a different number. I would love someone to be able to give me some advice on this one...
Opt. Drive - LG Black 14X Blu-Ray burner
Cooling - Cooler Master Hyper 212 EVO, G.SKILL FTB-3500C5-D Fans

Again, any critique/recommendations would be much appreciated. I would love some input, especially on what size PSU I need before I complete this build. Thanks in advance.

 

[Poltregeist]

That build looks pretty nice! What is your budget? I may help you change a part or two. With Ripjaws X RAM, the high heat spreaders may conflict with your 212. Get low profile RAM like these Corsair Vengeance: http://www.newegg.com/Product/Product.aspx?Item=N82E16820233186

With the mobo, if you can spare a bit more money, you cannot beat the Asus P8Z77-V PRO: http://www.newegg.com/Product/Product.aspx?Item=N82E16813131819

For most Intel builds where you aren't going to overclock your CPU like crazy or have SLI/Crossfire, you cannot get a better PSU than the Corsair HX series. If you aren't planning on overclocking, go with the 650W. If you plan on overclocking go with the 750W, and the 850W if you want to possibly SLI in the future with that 660.

If you tell me your budget I can get the perfect parts for ya.