That's actually a good question
Well, I have in my possession:
Desktop A1200, 040@25MHz, 16MB 70ns, PCMCIA ethernet, 1.2GB HDD
Towered A1200, BlizzPPC040@25/603@240MHz/SCSI, 256MB 60ns, BVision, PCMCIA ethernet, 10GB HDD
Towered A1200, 040@28MHz, 32MB 60ns, Mediator, 32MB Voodoo 3000, 20GB HDD, PCI NIC
E-UAE on main PC (Q9450, 4GB DDR3, GTX275 etc)
A1 XE, 7445@800MHz, 128MB PC133 (need to upgrade that), 256MB 128-bit Radeon 9250, SBLive 1024, 80GB
Old Duron 1200 (was testing AROS on that), 512MB PC133, nVidia GeForce 4MX (weak), 80GB HDD.
Dead A600 *sniff*, awaiting repair.
I enjoy using all of them, when I get the chance.