Hello fliers,
Remind yourselves when considering the "reliability" of the aircraft, that very many parts, particularly nearly everything bolted to the engine mount, everything electrical, and all avionics and instruments are really not Piper parts, and so difficulties with these could as easily occur in any type in which they were installed. Their reliability (or lack of) should not affect opinions on the aircraft type in which they are installed.
What you would really be considering when judging a particular type's reliability would be airframe and some systems. Unreliable to me would be airframe, landing gear and control system problems. Piper aircraft are very good in these respects in my opinion.
Pilot DAR