Mooney 201 question

Hello

I am looking at Mooney 201 airplanes, due to their performance and good
fuel consumption, and had a few questions.

1) Which model year is more desirable than other years (SB's, ADs, etc
reasons...) ?

2) Which year did the tan colored panel come out? Can an older 201 be
retrofitted with the tan panel?

3) Which autopilot is recommended? If I had two 201's side by side,
which autopilot is preferred?

etc etc

any other info on 201's is appreciated.

THANKS GUYS