I rarely see any talk on any forums about my particular Infinitys. I have speakers from the last Kappa series. These speakers were originally made for the European market. However, they were sold in the US for a couple of years before being discontinued. So, they are not widely known and are kind of hard to find, but I do occasionally see them come up for sale on the auction sites.
I have a complete Kappa system. The 600's as the mains, a pair of 200's for the surrounds and the Kappa center. For the sub I have dual Infinity Intermezzo 1.2s subwoofers. It's a wonderful system. I've had it about 10 years now and I don't have any complaints nor any desire to upgrade. This system is great for music and movies. I normally listen to music with 2 channels only and the 600's are downright spectacular for this. These speakers were originally fairly expensive, but I was able to get them at their close-out price. I consider myself very lucky to have found them because they suit me perfectly.
The Kappas were, by all accounts, exceptional.