I am using e-uae here(believe 0,8.28) and speed is ok.
I am playing Banshee apydia turrican with whdload in the uae atmosphere.
But am using a pegasos2 overclocked to 1.27 Ghz.
Don't know if efika can handle it?
On this machine euae feels like a 1200 woth a 030 30MHz or something.