First Time Build- Need some advice

(1) Phenom II X6 1100T
(2) ASUS SOCKET AM3 M4A89GTD PRO
(3) Coolermaster Hyper TX3, Cooler master hyper 212, Arctic Cooling Freezer 7 pro - NOT SURE WHICH CPU COOLER I SHOULD GO FOR?? THESE ARE SOME I CAME ACROSS
(4) 4GB Corsair DDR3 1600mhz XMS3 - SHOULD I GO FOR A 4GB RAM OR 8GB?
(5) 1TB S-ATAIII 6.0Gb/s & Corsair 60GB SSD
(6) 22x DVD±RW DL lightscribe - I DONT NEED A BLURAY DRIVE
(7) Radeon HD 6870 1GB or XFX ATI Radeon 5770 HD 1GB - DONT KNOW WHICH GRAPHICS CARD WILL SUIT ME BEST, IM NOT ON A VERY HIGH BUDGET
(8) Case- Cooler Master Storm Scout
(9) PSU- 600W Xigmatek - NOT SURE WHICH PSU TO BUY?

Okay so its the first time im going to build a computer and I need some advice on what hardware I should actually buy. I'm not a big gamer, but do play game such as Battlefield and watch alot of Bluray movies and usually use WinRar, Nero burner, Microsoft Office. I'm looking for a GOOD enough graphics card which will let me watch movies in 1080p and play games and isnt too expensive. I definitely want to go far an Phenom 1100t and M4A89GTD PRO and would like to overclock in the future. Would just like to know if ive got a good combo going on and any advice or comments are appreciated.

How much of the budget do you carry for this computer build of yours? One of my friend was using a Scythe Ninja Copper Cpu Cooler on it and it fit fine. It covered the two and probably the third ram slot as well and it has a good height clearance so the ram sticks in it properly. As for the graphics card I would go with the Radeon HD 6870 and you can also expect a better fps than the later.

Im looking to spend around 600 GBP, so around 1000 dollars. Thanks for the advice, wasnt aware that you have to buy a cooler for the RAM? Yeah I was looking at the 6870, I'm prob going to go for that since its only around 40 pounds more than the 5770 are supposed to be much better? Any ideas about the PSU and if the hardware is a good match?