There has been some towers for A500 that give you the opportunity
to really max out, as I've done:
A500T in Micronik tower, with 3 ZorroII slots and A2000 CPU slot.
Mobo enhanced to ECS + HD floppy; Blizzard 2060 clocked to 57 MHz,
96 MB fast, CV3D and PicassoII+ or PicassoIV, SCSI CD-Rom, FastSCSI
4 Gig HD, monitor switcher, external flickerfixer, 1.3/3.1 ROM switcher
and for 1.3 use Oktagon2008 + HD + 4MB.