So like the title says, I have a gigabyte 650 TI Boost 2gb. I want to upgrade to the newer era of gfx. I am thinking of spending maybe about 200-275. What would be a good replacement in that price range where I would notice a large difference. Or should i just try and find another 650 Ti Boost to SLI it? I dont know if the newer cards would be better as single compared to this SLI.