cp/m box for software

[emanuel stiebler]

Hi all,

did a little work on cp/m in the good old days, and thinking about 
getting at least one machine up again. As it would be mostly for having 
fun with the z80 again (or 8085, z180, z280?), I'm probably not 
interested too much in having any of the collector grade machines.

So, the question is, what is the best cp/m machine for playing with the
software ?

cheers & thanks