Am I asking for trouble looking for a Z3100 at clearance prices, or will HP have some similar quirks with the 3200?
They supposedly are shipping the Z3100 newer ones and the 3200 of course with a new star wheel assembly that pretty much eliminates the gross problems encountered before with the early 3100.
That said any non aspirated platen will have some marks on the paper even if near invisible.
The problem with the Z is on third party media much more than on HP optimised media.
Quirks in software , yes expect those to continue.