If I wanted to make the fastest possible 3.9/classic system (excluding the Vampire cards), I'd get an '060/PPC card and then chuck on as many PPC-enhanced tools as possible. For example the PPC versions of the WarpDT's, AmigaAMP with PPC support, etc.
I wouldn't run 4.1 for classics on an actual classic system, too slow. Even though I own a copy, LOL. That's for if I ever set up an emulator!
Just my .02 cents.
