The IRS Betas are hard to beat, and at the price they sell for used, giant killers. I agree that ARC tubes for the panels are a no-brainer, as they were built and tuned with these electronics. They need a big room, lots of watts and quality components in font of them. I have had them for 5 years or so and have no interest in replacing them (upgrading is now focusing on front end components).
See http://www.audiophilia.com/features/tm1.htm for thoughts on appropriate room considerations for these speakers.
See http://www.audiophilia.com/features/tm1.htm for thoughts on appropriate room considerations for these speakers.