Want to get a good video card for my computer, but am not sure what to get. If possible, I want to keep it in the $100-$200 range, but I'd like it to be good enough to play all the new games at the highest quality settings w/ no lag/issues, if possible. I'm running an ASUS CM1730 desktop, AMD Phenom II X6 1065T Processor at 2.90 GHz, 8GB RAM, 750 watt PSU. Just looking for recommendations. If I could find something that'd at least let me play Assassin's Creed IV on the best settings, that'd be fantastic. I'm willing to pay more than $200 if necessary. HELP!