If you want rtg graphics workbench and more power then any Amiga has seen, run UAE on a 2GHz+ x86 system. Only trouble is, I don't have any software that can use that power.
I should have kept some of my productivity programs (from AGA era) it would have been nice to see them running with 3Ghz of power. If I could be bothered I might download some mp3/video programs from aminet and try them on WinUAE.
A few years ago I played GLQuake through beginning to end on WinUAE on a single-core Athlon system, in 1024x768 (uaegfx under P96). I don't think it ever dipped below 30fps (I kept a counter up).

It was sweet!
My someday experiment will be to run PCTask or PC-x under WinUAE on this new system and see how that works.