I currently have a Gtx 560 ti and I'm looking to upgrade. Was thinking about the Gtx 660 ti. This a good card? Would I benefit from going to the 670? Main game I'm looking to play is x plane 10, which can easily bog down the 560 ti if you add enough settings. The 660 ti would obviously be an improvement, but would it be worth the extra $50-60 to go for a 670? Any help is appreciated. Thanks