Quite a lot to digest in that question and it's not 100% clear what you're looking to do but I'll take a stab. I think the first things you need to do are
- determine exactly what you want to do with your airplane: touring and recreational aerobatics, competition... ?
- join your local IAC chapter if you haven't already and talk to owners and pilots of the types you're interested in to get a better feel for your options and gotchas (and, in fact, that may help you answer the first question).
In no particular order I'd say
- There's a huge difference between a Super Decathlon and an EDGE 540. One's a Swiss Army knife, the other is a scalpel. There's a lot to choose from in between.
- In another thread I think you mentioned you're working on your Private right now. If that's correct you're likely to hit insurance issues with an unlimited monoplane., and possibly some other types
- The Super Decathlon is a wonderful airplane to fly everything from 2-up touring to Sportsman-level competition. Theoretically it can fly Intermediate but that's very hard on it which brings us to...
- Used airplanes: don't rule out a used aerobatic aircraft, just make sure you get a great pre-buy done by an expert on the type. Also, don't assume a used Super Decathlon will be any less beat up than a used Pitts (for example). In fact, a hard-flown Decathlon (especially one that's done a lot of snap rolls) could be a real money pit. Worst-case: new wings. Obviously one that's been used for touring isn't going to suffer from that kind of issue.
- Similarly, I'm not sure why you are strongly opposed to wood but I wouldn't rule it out without talking to some experts. There are some phenomenally strong aerobatic aircraft making good use of wood.
- Don't rule out a Pitts based on reputation alone - that's a little bit overblown. "Nightmare to land" is an overstatement. Having said that, the earlier point about experience and insurance coverage applies.
- I very much doubt you'll get any kind of kit that approaches EDGE performance for $100K. The 300hp motor and prop alone would blow most of your budget before you even buy an airframe to attach them to.
- 1800 feet isn't that long a strip for a lot of aerobatic types, which tend to approach faster than a spam can. I assume you don't have an FAA standard 50-foot obstacle at both ends so you could probably get most types in there if you're precise but definitely check carefully for whatever you look at.
- IF you decide you're flexible on new vs. used and construction then the good news is that the aerobatic world's your oyster for $100K. OK, so you can't have a new EDGE or Extra but you could get a nice Super D, a pristine Pitts S-2B, a Laser, a Yak, possibly a Staudacher or any one of a number of aircraft that could serve whatever purpose you have. If you really want unlimited monoplane performance with practically unbreakable construction, and if you're mechanically inclined, you could get a Yak 55 with your budget (actually, you could get 2 Yak 55s with your budget). It helps to own an oil well, though.
Good luck, whatever you do. And if you can clarify the answers to some of the questions you'll be able to get help from people a lot more experienced than me.