Re: Worth it?
With your monitor and processor specs, yes, it is worth if you like gaming a lot and prefer high quality settings.
I see some 3dmark 2006 results on your signature, I got those some months ago:
8800GT, P35 mainboard, E6750, 6 GB DDR2 667: around 10700 points.
280GTX, P45 mainboard, Q6600, 4 GB DDR2 667;: around 16000 points.
DFI PS83-BL, P4 2800 (Bus 533), 512 MB DDR; Gforce3 ti200 128 MB; Audigy, Windows 2000 SP4.