Which upgrade would be better; HD 6770, HD 7750, or a 1920x1080 monitor? If I get the monitor I'll be sticking with my current GPU and vice versa.
AMD Phenom II X4 965 OCed to 3.8GHz on stock cooler (No, it doesn't overheat)
ASRock U3S3/960GM Micro ATX
Powercolor Radeon HD 6570
Antec VP-450 power supply
Generic 19" 1280x1024 monitor
I use the PC for mid to high range gaming, e.g. Black Ops and SWTOR, and haven't been happy with my frame rates. (~30FPS)
If you're not happy with your framerates, getting a new monitor won't fix that. 6770 and 7750 are roughly the same power, but 7750 is more efficient. Either will be at least two times as fast as your current card. I'd say GPU now, monitor later.