There will almost certainly be *some* slowdown when running the level of eye-candy that AfA delivers -- 32bit DualPNG & OS4 icons, skinning, antialiased fonts, etc.
However, your system sounds like just about the fastest bit of "classic 68k" hardware possible -- so give it a try!
It's easy enough to remove if you don't like it (just remove the command from your Startup-sequence).
Download AfA 4.0Ken's IconsScreenshot
