We've got, currently, in our house:
2 A600s
3 A1200s
2 NeXTs
1 PowerMac (I think... we gave some Macs away not long ago)
1 Ultra SPARC
1 Athlon 1400
2 IBM PCs
Laptops with everything from 8088 up to Pentium 3
1 Gumstix
A PC104 single board computer of some variety
and various other bits and bobs.
I used to have an Enterprise 128, well, I technically still do, but it's at my parents' house. My Dad has a silly amount of computers as well, though. ZX81's, Sinclair Spectrums, 2 Intellivisions, a Prinztronic, pretty archaic stuff... also several A1200s (including my brother's towerised one) and A500s.