1500/2000 Amigas have a lot more easier to use Accelerators than converting an A600 accelerator to match the 68k socket. I just wonder if the height of the adapter + ACA630 would have left space (in height) to use any other expansion...
A600 is a fine machine with flaws like the soldered CPU. Since ACA630 is out... It rox and it's stable as a rock. If the A600 is horrible cheap and nasty as you said... it's your opinion since many of us just LOVE our A600 and think they are nowadays cute little beasts.
Just make some search over EAB and you'll see that the thing you ask has been mentioned lotsa times.
Apart from that... you can wait for the upcoming (if Jens decides to produce it) ACA520
