Upgrade Gaming PC

Hi everyone!

I've got an old computer (3-4 years old now) that I would like to upgrade to use as a gaming computer for my girlfriend. Here's what I currently have.

Case: Antec Twelve Hundred
CPU: Intel Core 2 Quad Q6600 Kentsfield 2.4GHz LGA 775 95W Quad-Core Processor HH80562PH0568M
Cooler: Tuniq Tower 120 Universal CPU Cooler 120mm
Mobo: ASUS Rampage Extreme LGA 775 Intel X48 ATX Intel Motherboard
GFX: SAPPHIRE 100251SR Radeon HD 4870 X2
PSU: Antec 650 or 750 (not sure exactly which model or wattage. lol)
RAM: G Skill 4GB (2x2GB) DDR3-1600
HDD: Western Digital Caviar Blue WD5000AAKS 500GB 7200 RPM
Western Digital VelociRaptor WD3000GLFS 300GB 10000 RPM

I do not need a motherboard. I picked up an AsRock Extreme3 Gen3 from a friend for cheap cheap. That being said, CPU has to be socket 1155.

Approximate Purchase Date: Any time in the next month or two

Budget Range: Depends on performance to cost ratio. I'm flexible

System Usage from Most to Least Important: Gaming (Skyrim, SWTOR, MW3, etc), surfing

Parts Not Required: Monitor, keyboard, mouse, speakers, motherboard (mentioned above), HDD (I'll use the ones that are in it), Case (no reason to toss the 1200. It's big and ugly and loud, but w/e)

Now this is up for debate . . . is my 4870x2 a good enough card to run modern games effectively? I haven't gamed on this comp for a while now and the last game I played on it was WoW, so I have no idea.

Preferred Website(s) for Parts: Newegg. Scan.co.uk or equivalent if the price is similar

Country: I live in the UK, but have a US AND UK mailing address, so US or UK companies are fine. I will be paying in USD tho, so GBP conversion has to be comparable

Parts Preferences: Any

Overclocking: Maybe (who am I kidding . . . PROBABLY . . . can't have a shiny new cpu and NOT OC the crap out of it! haha)

SLI or Crossfire: If required. I currently have a 2x 6950 setup in my gaming rig and really enjoy the graphics, but if my 4870x2 will do the trick, I'm happy with that. Or if a single 6970 or 570/580 will suffice, that's cool too.

Monitor Resolution: 1920x1080


Let me know what you think. I look forward to hearing your suggestions. Also, if you think this computer in it's current configuration can run the games I listed above with moderate to good framerates, please let me know and why you think that. I'll toss the idea of upgrading altogether if I don't need to.

Cheers,
Chris

next week you can buy a radeon 7970 for $550 and its about the same performance as your two 6950s. if that sounds good but the 7950 will be much closer to $400 (no definate price yet) and has about 90% the specs so im suspecting 90ish% the performance.
that and a 2500k will do great. though if you can wait the ivy bridge processors come out in a month, maybe two since intel can afford a delay. they will be 10-15% faster for the same money.
skyrim and swtor are not at all graphically demanding games. my 5770 does fine with max settings. so your current card should do plenty good. and will likely get 20% boosts going from a q6600 to a 2500k even with a mild 4GHz OC

yeah, should be a nice system. for another year at least then you might want a new graphics card.