The FedEx man delivered my new Axiom M60ti's and a VP-150 center today. They are replacing my 6 year old Atlantic Technology System250 mains and center. All 3 of the 250's front speakers have 2 4" drivers and a 1" tweeter. Given that the M60's have 2 6.5" drivers and a 5.25" midrange I assumed that they would be sound much fuller and have a good bit more bass than my AT mains and center. After I hooked everything up I put in a couple of music CD's and a couple of DVD's to test them out. To my dismay, the difference isn't nearly as profound as I thought it would be. In fact, the 60ti's sound a bit harsh compared to the 250's Since there are no dealers around here that carry Axioms I scoured the message boards for weeks before I bought them. Many people have said that Axioms are initially "bright" sounding but that they usually tame a bit after they break in. I'm wondering just how true that is. I have 30 days to test them out which is why I bought them without hearing them. I figure a 30 day in-home test is better than listening for a few minutes in a store. So my question is do speaker characteristics really change after a short break-in period or do your ears just eventually adjust to the sound? I am driving these with a Pioneer Elite 24TX (90 watts/ch). Maybe a different receiver would help? I'm thinking of upgrading to a 47TX (130 watts/ch) - perhaps it would be able to drive these a little better?