interesting thread indeed....
thing is, some techno or electronic music is suited to the live environment, and some isnt... the more clubby, dare i say it commercial, stuff tends to suit Dj sets alot better and the more experimental, darker techno often lends well to a live set more simply because there is more room for experimentation in the music. This is not always the case tho i think, there are some really big names like DC whose live set is a really really impressive display of the work he's done over the past 10 years or so.
i personally love seeing live sets, both musically and technically its very interesting to me. I like seeing a geezer behind a bank of equipment or instruments like keyboard, all very boring to some but i enjoy it.
a good halfway house between live sets and djing would probably have to be surgeon with his on the fly re-edits of tracks via final scratch and ableton, something to keep everyone happy there i think at times... and as for the BMB live set, well, superb!