New Gaming Rig question

Hello tek users, in the link below you will find the parts for my new gaming rig. My question is should i buy one EVGA GTX 670 FTW Sig 2 or should i go with two EVGA GTX 650 Ti Boost Superclocked in SLi.

depending on what you gonne use the pc for.

but i would go  for a single EVGA  670.



One stronger card is allways better than 2 lesser cards in sli 

There is allways problems with sli some games dont like running with sli there are preblems with GPU scaleing and the added power usage just isent worth the hasle one 670 shude play anything

If it's a gaming rig, you are better off going with an XFX 7970 GHz edition. I saw one of those go for $419 on pcpartpicker.