I've never had much luck with quake and/or doom even on a blizzppc060@50 (ppc 603e@240) in an A1200T (back in the day) Perhaps the right vintage A4000 w/ cyberstorm060 etc.. would be OK.
1997-2000 - was a point there when many amiga people had RTG cards (picIV, etc) and 2 monitors, but not much software was written to RTG - and also at the same time poor diluted ports to the AGA hardware. These machines (060, 060+PPC) could have technically achieved better framerates/playability, but sadly there were so few people coding for the various (and small, population-wise) varieties of systems at the time.
Even with a fast 060 or 060 + PPC, better stick to 2d games and 2d gfx applications....
(That's essentially why I sold most of my high end Amiga HW.)
