Well, I went over to the seller's house yesterday evening and my head is still spinning from all of the awesome audio gear he has. Regarding his vintage Infinity speaker collection...seeing that many high-end Infinities at one time was almost too much for my brain to process. The phrase "I have been to the mountain top...and it was good" comes to mind.
The only pair he auditioned for me were the RS 4.5's, as that was what I had requested in advance. Powered with the Adcom mono-blocks, they did not disappoint and were nicely balanced with various types of music and had a clean natural mid and upper range without being bright or too forward like some other west coast brands can be. Oddly enough, the bass while solid, did not "kick me in the chest" as I had somewhat expected and the seller did mention that he feels they can benefit from a sub.
As I do not have a smartphone, I did not get any photos while there. However, I have attached a pic that he emailed me of the RS 4.5's prior to my appointment (hope it is viewable).
So far, he has sold the RS 2.5's and Kappa 9's, but still has 2 pair of QLS-1's, the RS 4.5's, RS IIA's (in black), Quantum 3's, Qb's, Modulus Sub/Sat 3-piece and the RS-1A's with the monsoon modified mids. He also has a set of Acoustats and various other bookshelf type speakers (B&W, Design Acoustics, etc.)
When I return, he promises to demo the Quantum 3's and the RS-1A's, which he stated are truly amazing. If the RS-1A's do indeed sound better than the RS 4.5's...I'm in for a real sonic treat.