Well if you can't do an 060 FPGA core for less than an actual 060 chip on an accelerator card then don't. The guy asked a simple question.
As to 3.5mhz chipset<----?? The bus is 7mhz, so is the chipset (well actually the whole thing is run at 28mhz I believe and clocked down to 7.09 or 7.14mhz IIRC)
And an Amiga is an Amiga, never had a problem running any non-AGA game on my A1000 so clearly an actual Amiga with an actual 68000 on the motherboard with a cpu accelerator which can be disabled is far more compatible than anything else. Ditto with an A1200 for AGA games. I don't get the problem, only games need that sort of compatibility.
As to the person putting Minimig into an actual Amiga case.....what you need is an A1200 keyboard and PS/2 keyboard adaptor and just use it inside an A1200 case etc. Problem solved for putting it all inside the machine. I did this myself with a mini-ITX board and said components to build a WinUAE machine inside an old A1200 case....pretty sick having x86 inside the A1200 case I know sorry!