Due to a lack of funds I can currently only afford to upgrade my graphics card but I can't work out which one will "future proof" me best until a complete rebuild. Currently running Asus Striker Extreme, Q6600 (Quad 2.4GHz), NVIDIA 8800GTS, 4Gb Kingston HyperX T1 @1066MHz and Win7 64bit. Seems like I have 2x PCIe x16 slots but I have no idea what would work given I won't be able to run anything too modern. Any ideas?