neophyte,
Welcome to the forums. I'm glad you find this place as informational as all the regulars do. I am going to attack the paragraph labeled 3, first.
The wonderful thing about speakers is that good design is timeless. Given proper (minimal) care, any speaker will give you the same sound on day 8,762 as on day 1. Axiom speakers are designed to be accurate and uncolored. 7 years from now, there may be new technology that can achieve higher levels of accuracy, but your Axiom speakers will still be able to admirably handle and clearly convey any music you throw at them.
I guess what I'm trying to say is that the speakers should be the least of your concerns when thinking about HT gear becoming obsolete.
