Higher resolution puts more strain on the GPU. Games like Crysis 3 and Far Cry 3 won't be playing at high or max settings with a 1080p resolution on a 650ti.
I bought 3x HP 22" W2071D and personally I love them. They may be only 1600x900 but the colors look amazing on them when pared with 2x XFX Radeon HD 7770 Utra OC Editions. I am able to run 90% at full resolution with my setup. You can Pick them up at Bestbuy for 22" a piece.