Personally, if I'm investing in a 4000 it would have to have PCI.
Then I could get a decent RTG card, like a VooDoo3 or A Radeon 9200.
Otherwise, I'd look at a 3000 with an '040 or '060 processor and one of Jen's neat flicker fixers (for better graphics modes). Cheaper, still Zorro 3, more compact, and it just looks nicer.