While CPU speed was okay-ish with the software emulators, graphics performance was underwhelming. You also had to suffer interlace for the high resolution modes.
>You also had to suffer interlace for the high resolution modes.
1200/AGA should have the double-scan (31KHz-ish) "productivity" modes. VGA monitors work just fine with these. The graphiti would have offered chunky modes (vs bitplanes) from AGA, for major performance improvement. Else, Amiga video cards generally do chunky.