Need help on new build with power supply and memory

I am upgrading my mobo, processor, memory on my current system. I am for sure buying a AMD FX 8150 or 8350(not decided yet if worth the extra $20). Either way I am going with the GIGABYTE GA-990FX AMD Motherboard.

As far as the memory goes. The board supports 4×240pin DDR3 2000(O.C.)/1866/1600/1333/1066. I just don't know what the best brand to go with and or speed for this board and processor combo.

And now on to the power supply issue. I was hoping I could use my current power supply that i have is OCZ model: OCZ600MXSP(600w). Can anybody help guide me in how to tell what i need for a power supply size.

The rest of my pc will be:

LG dvd/cd drive

video card: Sapphire Radeon HD5750 model 100284L

sound card: SB X-Fi Xtreme Audio (70SB104000000)

HDD: Seagate Barracuda ST1000DM003

Use a power supply calculator to calculate your load:
http://www.thermaltake.outervision.com/

Add a margin on to it;  Generally you can find something decent on sale far in excess of what you need.  Get a Seasonic branded or manufactured PSU for best results.

I don't run DDR3 over 1600 so no clue.

http://www.newegg.com/Product/Product.aspx?Item=N82E16820104277

There's your ram. If you dont like blue, just try to find something with specs close to that in the color of your choice.