Which graphics card should I get?

[SpartanSpurs]

So my current build is
Gigabyte Z68MA-D2H-B3
I5 2500k- Overclocked to 4.2Ghz (I keep changing it though)
8GB 1600Mhz Mushkin Ram
1TB Seagate HDD
500W Mushkin PSU
Corsair H60 Cooler

I will also have acquired after tomorrow a 120GB SSD that runs at 500MB/s and I think I'd be right in saying that my 550ti will be the bottleneck in my setup. So I just want some helpful advice on which one to buy. I was thinking of the Nvidia GTX 660 and that probably is the max I'm willing to spend but there are so many options (for god sakes there's a 2GB and 3GB version!!!). Anyway which one?

 

[SpartanSpurs]

Sorry I saw the thread about how to make this type of post after I posted this... I'm knew OK

 

[Commandermadi]

What is your budget?

 

[SpartanSpurs]

£160, £200 is pushing it but I might be able to get that if it would be worth it.

 

[RichterFry]

I'm not exactly sure how this translates into Canadian dollars, but if you can find a 6850 or up within your price range, it would much better suit your needs.

 

[regina_49]

I would recommend the GTX 660 MSI or Asus.