On the blues curcuit, I see more pros gig with a standalone single 15, more than any other cab. I'm talking about the volume levels at small clubs now. Larger clubs , of course take more power, and more cabs, but in general here, I see more guys using, just a single 15, much more than any other cab. About 25 percent have any tweeters, and 5 percent have any mid drivers. Mostly all, just a plain old 15. I've heard tell, that is Jeff Berlins favorite driver also. I'm an 810 guy, but have just gotten a couple of single 15's to try and get used to, for the smaller gigs, we are landing. These new Neo 15's are looking real tasty, but still don't handle the power that the old ceramics do, however, they look to make it up in SPL. I'll have to finish my taste test, before making a judgment on them. Single 15s, don't have much of a weight savings to worry about, in a cab anyway.The good old Carvin single 15, has always been one of my very favorite cabs. I see the new BR series has a tweeter in them now. Should make them stand out even better now.