I really like the Infinity Quantum & Q models from the late 70's (see: www.bobbyshred.com/infinity.html) I have a pair of Quantum 3's, Qb's and Qe's. I'd recommend these models to anyone, however, given their age, its not easy to find any that havent had some of their Original parts replaced.
I would like to point out another Infinity model that I own and it is a superb, repeat---> SUPERB speaker. The model is the Renaissance 90. Not too many people seem to know of this one. (Infinity also made the smaller Renaissance 80) They were made in 1992-94,95 when Cary Christie was in charge of the company and sold for a list price of approx $3600/pr. I can honestly say the Ren 90's are incredibly good speakers. They are a much improved design over the Kappa's that came before it with all new drivers- EMIT, EMIM, midbass coupler, and 10" Watkins woofer rated down to 27 Hz. To surpass the Ren 90's, you'd need to go with something like the Epsilon model- but given that those sold for approx $10,000/pr new in '95 and require much more complex setup and amplification, I think the Ren 90 is the absolute BEST BUY that can be made of any Infinity speaker. Not many are seen for sale, but a few do show up from time to time on Ebay and some other places and sell in the $1200-1600 range. The Ren 90's have NO weaknesses, they do everything extremely well- fast, tight, clean Bass, and OUTSTANDING Soundstage, Imaging/Focus. The blonde oak cabinet with the sculpted shape depthwise is GORGEOUS. A lmtd edition high gloss piano black finish was also available at extra cost. I have some foreign audio magazines (but translated into English) that reviewed the Renaissance models when they first came out in '92 and the reviews were impressive- the consensus was that the Renaissance was not merely a Great speaker, but one of THE best EVER made. Owner reviews can also be read at:
Note the Ren 90 looks MUCH more elegant than the scanned photo shown at audioreview.com. The black baffle is actually attached onto the back of the grille itself.
All of the drivers and components used in the Ren 90 are of the highest quality and built to exacting standards. No problems with woofer surround rot on this model as is so common with the older ones. Mr Watkins himself has framed photos of the Renaissance in his shop in Tennesee.
I realize I am not being overly- modest in writing about my admiration for the Infinity Renaissance 90:) - but the praise is justified. Infinity hit a home run when they made that model. I think more people should be made aware that this model exists.