the UXGA on the 6000 is a bit overkill and not really worth it over the SXGA for what little bump you get. SXGA is 1680x1050 and UXGA 1920x1200. The XGA is 1280x800, so the SXGA is a decent jump. Remeber that UXGA on a 9300 is 1920x1200, and the WXGA is 1440x900.
As far as size, the 9300 is 1 1/2 inches wider, 1 inch deeper and .1 inches more thick.
6000: 1.52x14.02x10.45 6.65lbs
9300: 1.60x15.50x11.30 7.85lbs
Not much difference if you want the 17" screen and 6800 Go.
If the 17" screen, 6800 Go, DVI out and 2 extra USB ports mean nothing to you, go with the 6000.