Heys pete, after a little more of a lookie at analogic, they only have 68030 cpus at 30mhz or 40mhz
for 99% of amiga games an 030 +ram is more than enough (trust me wing commander in the asteroid field is bloddy hard!!! on an 030@40mhz)
if you wanna power play (doom / quake and the such like) or need to power use with the likes of imagine raytracing etc. an 040/060 or even PPC but a good 040 at 33mhz is good enough for full screen doom and in truth you need a gfxcard + PPC for quake.....
its all down to what you want from your miggy