@DamageX:
> you can get 800x600x70hz interlaced
Yup. When I could not use my CV64 (Zorro III problem), I used a 912x612x72hz (overscan) mode with a flicker fixer on a (I think) 64 colours workbench. Speed was "okay" (I wouldn't go back though).
Now I'm at 1280x1024x16 Bit at 50 Hz (TFT) with a pixelclock of about 90 MHz, which is the highest the CV64 can do (with CGX, P96 couldn't go right up there).