I used to own the 601 s3's and had much the same feeling you're having right now; I used to LOVE them for most material. Really did. And a lot of that came from the fact that they were $450/pr...I really felt as though I had gotten my money's worth. I think yours retailed for $600/pr, but most considered that well spent due to the cabinet size/larger driver and thus, the bigger sound you got from them. I wanted them, I just didn't have the extra $150 at the time. Wow...those are long gone days.
Anyway, so since we had/have similar reactions, I can tell you my path, though it's been a winding one, but part of that is just that I like to try out and experiment with speakers. So, after the 601 s3's, my pairs went like this:
• Paradigm Monitor 5 (did not like these by the way...took them back and re-bought my 601's...stupid, I know).
• Paradigm Studio 20 v3's = LOVED these.
• Onix x-ls - changed cities, lost a job, had to down grade (generate funds). These were great considering what they cost me.
• Onix Ref 1's - traded my x-ls and cash for these. They've been rock solid.
Now, of these, my favorite...and this is purely subjective opinion...buy my favorites were the Studio 20's. I know, I know...on paper, the ref 1's should take them. And, if you were being analytical, you could probably make an argument that
technically the ref 1's are better. I am quite fond of them, don't get me wrong...hey, they're still in my apartment nearly a year later. That's about the longest I've ever kept a pair. However...the Studio 20's gave me (and this is just me) that visceral response you look for...that sense that's more about feeling than hearing. I really don't know how to explain it. But, to me, they're the pair I think about most often I guess. Even went back and looked at pair of v4's not to long ago. But didn't pull the trigger.
Now how do those relate to your specific question? My feeling was that, the B&W's seemed a bit polite, a bit lean, particularly in the low end when it came to rock and more aggressive music. This, at least in my room, was where the Studio 20's shined. They really were a treat to listen to, especially when I put in something that rocked.
Anyway, not sure that helps any, but I hope it does. Hope you have luck finding the perfect speaker for you.