Well, last night the tweeter in one of my Rt55is bit the dust. No real warning...just a static sound coming from one speaker. I immediately shut down the system. When I powered it back up the tweeter was DOA. I emailed Ken and in his as usual excellent manner, emailed me this morning with the way to get it replaced under warranty. So far so good...except as many of you know, the tri-lam is no longer available and the replacement is the silk-dome from the RTixx series. Ken assures me there is little difference in sound but it is a concern since this is the front soundstage of my HT along with the CS400i. I have read Sid's impressions. Has anyone else had to replace a tri-lam and if so what was your impression of how it matched the other tweeter and how did the sound compare IYO.