dear j:
you don't have to apologize for your post: moments of crucial decisions in our life are just like that, and it's interesting to read an in-depth description of your interests and concerns.
basically, i think that your answer is already above my lines, but i must add two considerations about technique.
first, and paramount, technique is a means for achieve something in a more effective way. it doesn´t exist alone, hence it's pointlessness when considered by itself. notice that i don't propose you give up your technique studies, nor i say there is one way or another: i believe very badly that when an artist turns its preocupations, and efforts, and body, and soul to pure technique, s/he becomes - all in a sudden - a non-artist.
in the other hand, our metier - especially if you points toward a career as a performing artist - asks for a highly developed level of technique, a varied and complete one, which allows you to play anything you need to, from byrd to ferneyhough.
however, there is something that makes me think a lot. why this need for precise and absolute technique, for difficult repertory, for things like that? well, i'm not that naive to minimize the importance of public and recording labels and all that is linked to a performing career, but - here is my real question - why do someone get into this? i mean, why someone needs to play a faster chopin etude, or another cycle of liszt's etudes, or the n+1 prokofiev sonata? yes, i do like all of that, but i don't really understand the fetish among pianists about this hard and fast and precise stuff.
i say that from a strange point of view: the last of my problems in playing is speed. i always think that is very strange a comentary such as: "oh! i love his playing...he's so fast". what difference does it make? furthermore, i didn't attempt at the piano the harder works (beethoven's 106, prokofiev's late sonatas, ligeti's etudes) but i did that at the guitar, and there is nothing particularly wonderful there.
of course, that contradict the accepted notion of virtuose, but to me it's quite simple: it's rather irrelevant if someone is playing, for example, brahms' klavierstucke opus 118/1 or his third sonata. i can find genius or the absence of it in both, and to me, very honestly, there is really nothing more special about a great performance of the later. i know that people judge a pianist for this whole: if someone play an outstanding version of the sonata, s/he must be a greater pianist than someone who did play an outstanding version of the opus 118/1. to me, there is no difference at all.
so, why i'm writing all that? to give one simple and precise advice: whatever you want to pursue, make it your very very own. from your repertory through your technique to your expression, don't emulate: be!
best wishes, and very good luck in your plans!