The ACA 1230/40 is a nice card, I used to have one. I have a spare ACA 1232/33 which I keep meaning to update to 50MHz when time permits! If I can pull that off it'll be one hell of a zippy 030 card. 128MB of RAM too is the icing on the cake.
The ACA1221 (original 32Bit 020) is a pretty decent card, when fully unlocked and clocked to 50MHz with 64MB fast ram. Just doesnt have the extra caches and mmu like the 030.