WHDLoad works fine with 2MB Chip / 2MB Fast. Although alot more useable when I went to 8MB.
The 68k handled them fine and speed was okay except for some Sierra games. Alittle laggy.
Went to a 68010 and that was fine too, thought I needed it for the quit to key to work. But tested that on my setup with the 68k and the quit key was still working. So puzzled by that. Might be the games I tried.

My current setup is fine for 90% of the games out there and the speed is fine.
Can run 8 colours in the workbench too :-) No wallpaper though that kills it :-/