I have a pair of budget GSO 9600xxx in SLI - they are about to be removed from my ageing / half dead skt 939 +4800... for their new home; Z77 Asrock Extreme 4, 16Gb Samsung green DDR3 (and hopefully) an i5 2500k ....
which I'm having kittens over.... but that's in the CPU forum 
So, much as I'd love to replace the GSO's straight off - the new core of my budget SLI has emptied the bank account for the minute.
Will I be OK? AND ...staying on a budget theme
IF I found some ££'s next month, what kind of leap would I get from 2x EVGA GeForce GTX 460 Superclocked 1024MB cos they look a mighty good price in the clearance section atm (ps - I waited untill the GSO's were sub £100 too!) 
which I'm having kittens over.... but that's in the CPU forum 
So, much as I'd love to replace the GSO's straight off - the new core of my budget SLI has emptied the bank account for the minute.
Will I be OK? AND ...staying on a budget theme
IF I found some ££'s next month, what kind of leap would I get from 2x EVGA GeForce GTX 460 Superclocked 1024MB cos they look a mighty good price in the clearance section atm (ps - I waited untill the GSO's were sub £100 too!) 

and comes in at £107.99 where as the 7850 is twice the RAM ... its over £80 more