I've got to support Thiel. It's hard to pick an exact model, but I've heard a good number of them, and to my ears, they are the best all around speakers that I have heard. But if I had to vote for a particular model, then I'd say the CS3.6, which is what I bought. True, there are newer models that have more clarity, but the 3.6's sound very musical to me.
Yes, Martin Logan's can get my pulse rate up as well, but to me, they aren't quite as well rounded as comparable Thiel models. The older AR's are pretty darn impressive, too, especially when you consider their size and price. I have always thought that the TSW series from AR didn't receive the recognition that they deserve.
Tom.