I cannot seem to make by mind on either to, buy a new GPU or should I go with SLI. I currently have: i5 2500k, Asrock P67 extreme4, 4gb of Mushkin DRR3 ram, 4 TB of hard drives, Corsair TX750 PSU with an Zoteac GTX 460 1gb (not the SC). All in a Corsair 600T. I have about $350. And I do not know what to do with it.
1. Should I buy a new 6970?
2. Buy a gtx 580 and use the 460 and a physic card
3. Buy another 460 and go nuclear (sli)
4. Buy another 460 and use the remainder on upgrading my ram or buy a H70.
5. Or should I just save my money.
SLI is going to be the best option, IMO. You already have the power supply for it, and it will give you a ~85%-90% performance boost. I really don't think it's worth getting a GTX 580 or HD6970 because in both of those cases you take a loss when you get rid of the current GTX 460, and then spend more yet on the new card.