Sorry for the slow reply. Sadly they are sitting in boxes awaiting my build. I did extensive testing not against my Monitor 70s but against JLB and a couple other brands that were being pushed in store and I was in heaven with the TSX's warm tones like honey, and a clarity I don't believe I was getting with my monitors (that I still love), richer tighter base notes.... those were my thoughts when shopping. I will side by side compare later and let you know though.
$125/each is a steal for the 8's. I would be hard pressed to not pick them up at that price. With that said, I just came back from Fry's to do some additional listening, but this time I took my ipod loaded with a variety of tunes to test out the speakers. I was planning on just listening to the 8's and the tsx440's just to make sure, but wouldn't you know it they now have the tsx550's as well. The 440's were immediately disqualified for the same reasons as last time...just seems to me like sounds are lost in a muddle. Kinda frustrating actually.
I spent most of 90 minutes going back and forth between the 8's and the 550's and I gotta say that I like them both for different reasons, but for my ears and musical tastes I really liked the warm rich tones from the 550's. I put in the quote from bigfelter from Sept because I thought almost exactly the same as his comments.
I'm going to have to mull this one over a bit more.