Not me, the only one I've never had is the A1500, which seemed to be a UK/Europe? only A2000 with a different label.
Rumour has it that it was produced simply to mess with the plans of Checkmate Digital's A1500...a replacement 3 box design case and keyboard rehousing kit for the A500.
My answer is no but then I am not interested in A500+ and A4000Ts aren't worth the expense especially as half of them have faulty HD floppys when I ask the sellers! So that leaves A3000 variants and CDTV. Wouldn't mind either of them. Don't really care about the UNIX machines either.
To be honest there wasn't enough difference in models for me. One of A500/1000/1500/2000 and an A1200 or 4000 covers all I need.