Any issues with this under $900 system?

[evilfromthe8thdimension]

Hello guys
I've been on a long gaming hiatus, but with Skyrim finally out and Arma 3 on the horizon I've decided it's about time I started again. Unfortunately, my five year old gaming PC just won't cut it any more, so I've decided to build a new one. My budget is hopefully less then $900.

Naturally I have my own mouse, keyboard, and monitor, and I figure I can just take the sound card and HD from my old PC (I play with headphones anyways). Anyways, here's the parts I've decided on so far:

Processor: Intel Core i7-2600K Processor - $299.99
http://www.amazon.com/gp/product/B004EBUXSA/ref=ox_sc_act_title_3?ie=UTF8&m=ATVPDKIKX0DER

CPU Fan: Cooler Master Hyper 212 Plus 120mm Sleeve CPU Cooler - $24.73
http://www.amazon.com/gp/product/B002G1YPH0/ref=ox_sc_act_title_9?ie=UTF8&m=A2EUTVCJXLAJ4K

MOBO: ASRock H67M-GE B3 Intel H67 Micro ATX DDR3 1333 Motherboard - $85.99
http://www.amazon.com/gp/product/B004S9ROCQ/ref=ox_sc_act_title_1?ie=UTF8&m=ATVPDKIKX0DER

GPU: EVGA GeForce GTX460 SE 1 GB GDDR5 PCI-Express 2.0 - $180.00
http://www.amazon.com/gp/product/B004DKWLB4/ref=ox_sc_act_title_7?ie=UTF8&m=A25LSF9C5K7DJC

RAM:Corsair Vengeance 8 GB ( 2 x 4 GB ) DDR3 1600 MHz (PC3 12800) 240-Pin - $59.99 (Approx)
http://www.amazon.com/gp/product/B004CRSM4I/ref=ox_sc_act_title_2?ie=UTF8&m=ALQQARHSP90B8

PSU: Antec BP550 Plus 550W ATX12V V2.2 Modular Power Supply - $68.15
http://www.amazon.com/gp/product/B0017KE3DM/ref=ox_sc_act_title_6?ie=UTF8&m=A3KGNLL200UCI2

Case: Cooler Master Centurion 5 ATX Mid Tower Case - $49.99
http://www.amazon.com/gp/product/B001NEJMGU/ref=ox_sc_act_title_4?ie=UTF8&m=A2NG4HB43UEDVL

OS: Windows 7 Home Premium SP1 64bit - $99.99
http://www.amazon.com/gp/product/B004Q0PT3I/ref=ox_sc_act_title_5?ie=UTF8&m=ATVPDKIKX0DER

Grand Total: Approx: $860

Now, here's my concerns:

2600k vs. 2500k: As far as I can tell, the only real difference is hyperthreading. Some people say it's important, some people say it isn't. Consensus?

CPU Fan: I don't really plan on overclocking. Should I go with a cheaper unit?

Motherboard: I'm kind of concerned as to whether it's compatible with the CPU I chose, because its product description reads: "Supports 2nd Generation Intel Core i7/i5/i3 Processors." What does 2nd generation entail? Does that mean it doesn't support 1st generation? Are 2 SATA3 ports enough for the i7 (I've heard it has issues with SATA2) Should I just splurge on a better motherboard?

Any advice is appreciated, as I said before I'm kind of out of the loop with modern gaming technology. Thanks in advance.

 

[Sailor Moon]

You're probably better off saving money by just getting an i5 2500k...furthermore, you might want to get a more powerful PSU from a reliable brand. Hyperthreading really isn't important unless you're actually going to need it for things such as transcoding, etc. I also recommend the HD 6870 over the GTX 460, they're pretty much the same price but the HD 6870 will definitely outperform the 460.

 

[vitornob]

If you are going with an unlocked processor (k line) get a Z68 mobo to allow the overclock

 

[Gothams Finest]

If you are going with an unlocked processor (k line) get a Z68 mobo to allow the overclock

+1.

A P67 motherboard will also allow you to overclock. The main difference between the P67 and Z68 is support for SSD caching on Z68.