i think you get better results, when you use UAE on your aone ;-)
You can use graphiccard.
the system specs to use all features in usefull speed is a a 040/25 gfx card and 16 MB ram.
when i switch on my system JIT off, i get that 040/25 speed.
On 8 bit screens the new skin system is switch off.
It is also faster in AFA to use 16 or 32bit workbench, because icon display use no palette.
On 8 bit screens the most time does it cost to remap the icons to the current palette