Sunnyjim,
The Bryston/PMC Owner's circle on www.audiocircle.com has a wealth of information on PMC speakers and ATC vs PMC has been discussed a lot. You might want to check it out if you haven't already. I've only listened to the IB-1 (I own a pair and the IB-1 center). I would think it would be worthwhile for you to listen to the GB-1, FB-1, and the OB-1.With the IB-1's, you hear what is on the recording. If you have a bad recording, it will sound badly. The IB-1's are phenomenal speakers in the bass, mids, and highs in my opinion. The OB-1 shares the same mid and tweeter as the IB-1's. Hope this helps.
The Bryston/PMC Owner's circle on www.audiocircle.com has a wealth of information on PMC speakers and ATC vs PMC has been discussed a lot. You might want to check it out if you haven't already. I've only listened to the IB-1 (I own a pair and the IB-1 center). I would think it would be worthwhile for you to listen to the GB-1, FB-1, and the OB-1.With the IB-1's, you hear what is on the recording. If you have a bad recording, it will sound badly. The IB-1's are phenomenal speakers in the bass, mids, and highs in my opinion. The OB-1 shares the same mid and tweeter as the IB-1's. Hope this helps.