I listened to most of the line right at the factory in Norwalk. Having no interest in adding a sub to my two-channel system, I was especially sensitive to bass response.
The entire TS range is impressive where detail and imaging is concerned, but it wasn't until Louis suggested I listen to a (then) "new" model called the TSI "grande" that I was satisfied with the low end output.
A lot of people are excited about the Super 3 system; and I can't wait to get over there to listen.
As far as the sensitivity question, I think 96db is pretty dang sensitive, and in a medium sized room, my SET amp (5W Triode, 15W Pentode) sounds fantastic with the Omegas.
For 'speaker cable, I've been delighted with the Mapleshade Double Golden Helix: with a topology as simple and a price as sane as the Omegas themselves.
Ths is your buddy's last
chance for buying the audio equivilant of a motorcycle before his nuptuals. I'd recco he go for the "1's", in not only the "Gande" but the "R" version. Because, IMHO, that was, at least a few months ago, Lou's "top-of-the-line". Yet...
I also know he's very excited about some new designs. In fact the "Grandes" evolved from the test pair I took home to a slightly modifed design in the pair I actually purchased.
Why not go to his site and email Louis directly? Explain the guy's listening tastes and the amplification and the rest of it. You can be sure of an honest suggestion.
Good luck. And congrats to the groom.