Games that are known for having deep rule sets all seem to be out of my price range. What are some of the deepest rule sets you can find for under $3500?

Heh heh, been down that road. When I bought my first pin, I was planning to spend $1-1.5k... ended up falling in love with a DH and spent $3500. Wasn't planning on getting another one for a year or so... but then a few months later I saw a really nice FP and jumped on it. So when I say "under $3500," what I really mean is that my sane, responsible budget for this purchase is under $2000... but, I think I can talk myself into up to $3500

Thanks to everyone for the suggestions. A lot of these sound good and I'll keep an eye out for them, there's a JD and a TS on location near me that I haven't gotten around to playing much yet.

I've never played RBION, how hard is it? The two that I have now (FP and DH) are both brutal drain monsters, which is fine with me but not so great for non-pinhead guests. Would be good if the next one is a little more forgiving, in addition to having more depth to the rules.

Does it let you make some progress and feel rewarded without having to hit shots that are really tight? I think that's the biggest thing for engaging the non-pinheads. The game that sucked me in was Star Trek, because even before I had developed any skills there were still some shots that I could make that made me feel like I was getting somewhere.