CV64 is only Zorro III so I guess more people might be looking for 2000, 3000 video card. 3000 can use CV64 but has to have buster 11 to enable Zorro III if you have an accelerator. CV64 will work on 3000 with older buster but only at 030 25mhz. So I guess it is a matter of Purpose. The CV64 is a much faster card though and is probably the ideal 3000 card since it has a built in flicker fixer. For the 4000 without flicker fixer I would go with the picasso IV, Although the CV64/3d card is a good alternative if you can find a rare CV64/3d scan doubler but not to sure if that works with aga screens. I think you mad a good decision, I have a couple and use one in a 3000D and it works great.
