for that $150 list money it would be the
9575 . Amazon at ~$115
Good enough at the list $100 price point is the
9550 Amazon ~$67
None of the code readers are as capable as the Durametric (s/w for the Windows Laptop and cable) or the Porsche computers the dealers use (PST2 and PWIS).
Anyone in the area you can borrow from? Fellow Porsche owners? Other car club members?
good luck.