I have an A600 (rev1.5) with Kickstart 3.1, 2 MB Chip memory and 4 MB Fast memory SRAM card and a 4 GB CF as HD. Most of the WHDLOAD games runs on this machine.
If you want also AGA, then you could try to find a CD32 with SX32. This will be the smallest Amiga with AGA, but very expansive.
