Looking for advice on a spec :D

[bg92]

My brother is looking to buy a gaming pc. What do you guys think of this spec? Would like to spend £850 MAX. Any modifications you would suggest, would like it to be future proof, and would the psu be enough for 2x 6850 in the future in crossfire??
Case
COOLERMASTER HAF 922 MID TOWER GAMING CASE
Processor (CPU)
AMD PHENOM II X6 1090T (3.20GHz/9MB CACHE/AM3/) - BLACK EDITION
Motherboard
ASUS® M4A89TD PRO/USB3 : DDR3, USB 3.0, SATA 6.0Gb/s, CrossFireX
Memory (RAM)
4GB KINGSTON HYPER-X GENESIS DUAL-DDR3 1600MHz (2 x 2GB KIT)
Graphics Card
1GB ATI RADEON™ HD 6850 PCI EXPRESS - DirectX® 11
Memory - 1st Hard Disk
640GB WD CAVIAR BLACK WD6402AAEX, SATA 6 Gb/s, 64MB CACHE (7200rpm)
1st DVD/BLU-RAY Drive
24x DUAL LAYER DVD WRITER ±R/±RW/RAM
Memory Card Reader
INTERNAL 52 IN 1 CARD READER (XD, MS, CF, SD, etc) + 1 x USB 2.0 PORT
Power Supply & Case Cooling
CORSAIR 750W PSU (TX750) 80+ ULTRA QUIET (£88)
Processor Cooling
SUPER QUIET 22dBA TRIPLE COPPER HEATPIPE CPU COOLER (£19)
Sound Card
ONBOARD 8 CHANNEL (7.1) HIGH DEF AUDIO (AS STANDARD)
Network Facilities
ONBOARD 10/100/1000 GIGABIT LAN PORT
USB Options
6 x USB 2.0 PORTS @ BACK PANEL (MIN 2 FRONT PORTS) AS STANDARD
Operating System
NO OPERATING SYSTEM REQUIRED
Office Software
NO OFFICE SOFTWARE
Anti-Virus
NO ANTI-VIRUS SOFTWARE
Surge Protection
Belkin 4 Socket 2M Surge Protector with £25,000 Protection! (Special Offer £6)
Warranty
3 Year Silver Warranty (1 Year Collect & Return, 1 Year Parts, 3 Year Labour) (£5)
Delivery
STANDARD INSURED DELIVERY TO UK MAINLAND (MON-FRI)
Build Time
Standard Build - Approximately 9 to 13 working days
Quantity
1

Price: £839.00 including VAT and delivery.

 

[Phoenix]

Change the CPU to a Phenom II x4 970 because most games won't use more than 3 cores. The 970 will provide better performance in games due its cores being faster, change the RAM to 1333mhz because unless you're overclocking it's just a waste of money and won't benefit you. With these changes you can afford to put a Radeon HD6870 in the build instead of the 6850 which is a better GPU and will provide more performance from crossfire, a TX750 will be enough to run the system with two 6870's.

 

[PCS]

Great spec, well balanced, and consider the advice from Pheonix as it may save you a few pennies.