The Ref 30 is in it's own class at it's price it cleans house. The 307 is a ref 30 with cheaper amplifiers and hence the Ref will sound better than the 307. The next step up I'd say is the Tag and Integra piece but they are close to 2X the price.
B K Reference 30 Audio/Video Preamp
Okay, I just got this thing set up. Sounds awesome. But the little voice in the back of my head is telling me that I'm missing something. I've listened to the Bryston SP-1, Lexicon(take your pick which model), Parasound, Acurus, Aragon, California Audio Labs. What it comes down to is cost. The stuff that sounds better, like the Bryston, costs a lot more. Does anyone know of any other Pre-processor in the B&K price range that I should listen to before my return period runs out? Thanks all, for any suggestions.