The Eyetech ads used to have a line about 'all A1200 expansions have been tested successfully on a rev 1d1 motherboard. Other revisions may require modifications to work properly' (or something like that). So I guess rev 1d1 motherboards are among the better ones.
Rev 1d4 and 2b have known timing problems.
And yes, as Kronos says, C= stuff is better than Escom stuff.
-Paul