Almost Done!!!

Hello,

The items I have already purchase are italicized. I’m having difficulty selecting a case and a PSU (wattage & brand). I’m hoping you could help me out with this. This is my 1st PC build.

CPU: Intel Core i5-3570K Ivy Bridge 3.4GHz (3.8GHz Turbo) LGA 1155 77W Quad-Core Desktop Processor Intel HD Graphics 4000 BX80637I53570K
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Motherboard: ASUS SABERTOOTH Z77 LGA 1155 Intel Z77 HDMI SATA 6Gb/s USB 3.0 ATX Intel Motherboard
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Video Card: EVGA GeForce GTX 670 FTW 2GB 256-bit GDDR5 PCI Express 3.0 x16 HDCP Ready SLI Support Video Card 02G-P4-2678-KR
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Hard Drive: Western Digital Caviar Black 1 TB SATA III 7200 RPM 64 MB Cache Internal Desktop Hard Drive Bulk/OEM - WD1002FAEX
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Memory: CORSAIR Vengeance 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Low Profile Desktop Memory Model CML8GX3M2A1600C9
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

CPU Cooler: COOLER MASTER Hyper 212 EVO RR-212E-20PK-R2 Continuous Direct Contact 120mm Sleeve CPU Cooler Compatible with latest Intel 2011/1366/1155 and AMD FM1/AM3+
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

SSD Hard Drive: Crucial M4 CT128M4SSD2 2.5" 128GB SATA III MLC Internal Solid State Drive (SSD)
http://www.newegg.com/Product/Product.aspx?Item=20-148-...

Optical Drive: ?

Case: ?

Power Supply: ?

Questions:

1. Can you recommend a power supply brand and wattage? I don't understand how people figure this out. I see people with 750 and 650 watts in the same PC.

2. Is the 3rd party CPU cooler necessary? I notice that a lot of people have it.

3. Are there any internal parts that I may be missing (I have considered 3rd party 120 mm fans but that would be dependent on which case I get).

4. Because of the hardware that I have, do I have to have a full tower PC case?