well with-out a doubt it would be A1200 based
with that I would add a 4GB hard disk / CF Card (the latter preferably) and an Internal Optical Device.
As an accelerator then for 99.9% of games an 030 + 16/32MB of ram is tastey enough, but if you want DOOM / Hexen and half decent c2p game action then plumb for an 060
(for that 0.1% of games LOL)
aye.... love that a1200