Yet another classic hardware upgrade thread taken over by WinUAE talk....
@xaccrocheur
If you want to keep true to your A1200 desktop, a Blizzard 1260 or BlizzardPPC with a 68060 is a nice add-on. You may run into power supply issues but you can adapt a pc power supply to solve that. For 16-bit audio you could try adding a Melody 1200, Delfina or other 'clock-port' sound card inside the original A1200 desktop case. You'll still be limited to AGA for graphics, but you'll free yourself from the limitations of Paula for sound and a 68060 is a nippy cpu for everyday use on a classic amiga.