All, thank you for the thoughtful replies.
I emailed Martin last night, hadn't heard back this afternoon and didn't think much of it... then I checked my spam. Thank God I did! His reply was amazing and generous.
For starters, I basically laid out in the email what I did here in my first post. What I want, the "sound" I'm shooting for, what my budget was along with some general questions. He can definitely do everything I want for $3000. Headless (which I definitely want) adds $450.
Basically some tidbits from the email, things others might be interested in --
When asking him about his hybrid neck, or if he could do carbon rods, he said:
And headless:
I won't quote him directly on this, but my build time would be very reasonable, probably a little quicker than others since it's mostly a vanilla build.
I will also check out Cliff Bordwell but so far everything is feeling like "this is it" with Martin (who knows, I may be saying the same thing about Cliff tomorrow, I'm a slut). I felt like "this is it" too w/ ACG but the issue was going to be exchange rate and import duties, probably bringing me in closer to $3800+ (with close to a 12 month wait).
Also, forgot to mention -- for my build, Martin recommended Aguilar Super Doubles -- anyone have experience with them or use them for a build? These are going in an all walnut body with maple neck wenge board. Kind of looking for a burpy/agressive mid range, tight low end for an overall fusion vibe but will be doing lots of chordal stuff too. Warm clarity/articulation on the top wouldn't hurt.
ALSO (last thing) -- Keith asked me my thoughts on 33" and I quickly warmed up to his recommendation (in his words, a sweeter sound C). Less pingy and brittle. Yeah, I think I would like that. A little reach never hurts, too.
Thanks for listening to me blab, the Martin email has me a little stoked