Need advice before completing new build

[Dorsai1]

I'm going to cannabilize my 4 yr old gaming rig to build a new one and I'd like to salvage what I can for now to save $ -- trying to stay around or under $600 (can go to $700 if necessary). Used primarily for games like GW2 and Planetside 2 plus streaming movies. I'm not too concerned about the case or optical drives but need advice on re-using psu and hdd.

The psu is a Cooler Master 850W unit -- RS-850-emba that is 80+ certified.
The HDD is a 320GB Western Digital.

I've had no problems with either and I'll be upgrading the HDD later this year if I don't do it now with the new build.

Any problems re-using those two items?

I'm thinking about the following build -- feedback welcome

CPU Intel Core i5-3570K 3.4GHz Quad-Core ($189.99 microcenter)
Motherboard ASRock Z75 Pro3 ATX LGA1155 ($84.99 Amazon)
Memory G.Skill Ripjaws Series 8GB (2 x 4GB) DDR3-1600 ($40.93 NCIX US)
Video Card Sapphire Radeon HD 7870 GHz Edition 2GB ($194.99 Newegg)

http://pcpartpicker.com/b/zoZ

Also, if I'm not currently planning on over-clocking then I think the stock cpu fan should be fine -- is that right?

Thanks for your input

 

[Lord Tumnas]

if you dont plan to overclock, the stock cooler is fine (im doing the exact same and my cpu only runs at 41C with an ambient of about 27C)
a 60GB SSD would be worth the money as well, use it as a boot drive, and store games on the HDD

 

[TheBigTroll]

if you are not overclocking, you can save money buy just buying a locked chip

 

[Dorsai1]

if you are not overclocking, you can save money buy just buying a locked chip

Not planning to overclock to start but I like having the option -- may help me extend the life of the system later.

 

[TheBigTroll]

either you overclock once you get it or just dont overclock at all. you would always forget and then when you want to overclock it, the performance difference wouldnt be a big difference