i'm interested in purchasing a used Z, what are the different trim levels and how different are they? What is the interior like spacious, tight? Any other information could be cool too.
The best thing you may be able to do online is to go to car sites, like edmunds.com, kbb.com, autos..com, and so on. There are lots of useful info and discussion threads.
Even the base fan model is nice. You get leather and heated seats and other minor things when you bump up a level. it is comfy for 6' tall people, as indicated by those who have ridden with me. I love mine.