@doctorq
There do exist a 7*Zorro3 slot bussboards so theoreticaly it should look something like (7*256)+128+16+2 and if I'm not mistaking there's actually a 2GB (or was it 4GB?) ram window that the Amiga will handle so 1938MB shouldn't be a problem. :-D
Personaly 128MB have covered all my ram needs for ages. Most unpack jobs and other temp destinasion jobs fit nicely in 128MB. Most I've seen is 256+2 on a BPPC and most I've owned is 128+16+2 on my old CSMK1 A4000.