That's a close one for me, but I have to say my 4000D's and 4000 Micronik, because the last one has a CS PPC 060/200 with Cybervision.
But the A1200 is just an inch behind
The least one used so far is the A1000, just haven't got around it to patching it up.
Seller told me it was upgraded to 2MB, but I didn't even have a look inside, it works, that's what counts.