I just purchased three 6T6 for LCR and two Swan Diva bipolar surrounds. These will replace my Klipsch THX Ultra II speakers. I'm driving them with an Onkyo 805 and have an Hsu VTF3 MKII sub.
I sold the Klipsch because they are overkill for my setup. The room is an open design and most of the listening is done at very low levels to not disturb the kids, wife, etc. Plus, with a baby on the way, I doubt I'll be crankin anything up now that I no longer have a dedicated room.
based upon reading this and other eD threads, it sounds like the 6T6 would be a nice replacement. The klipsch were not particularly bright and imaged well. At near reference levels they are outstanding. Unfortunately, it's rare to gothere at 10pm when the kids are asleep.
For the money, total of around $750 (approx 1/3 of the Klipsch resell value), I don't think it is a bad decision.
I'll post my thoughts on the switch next week. Going from PSB Image 6T, 9C, and surrounds to the Klipsch THX was a big change (Klipsch were more dynamic and have less brightness). Maybe these will compete with the PSB performance.