You hit the nail on the head GT - my buddy has a pair of these and his thing is later 70s - early 80s hard rock. The 910s are just amazing with that stuff. We cranked "Never Been Any Reason" by Head East and jaws were dropping!
Yeah, I figured. They have the right voicing for it. That solid, punchy bass must fill all the spaces just right. W90's are great with it, but it could be a lot better for sure. That stuff has a real forward upper midrange that clashes a bit with the stout mids of the Wharfies, which I think are a bit stouter than ADS mids, especially when you consider that Wharfedale bass really isn't a forward, extra-kick sort of thing, which that music needs to sound it's best (And the ADS bass is, at least in comparison to those old Wharfedales. (HPM100's are great speakers for late '70's/early '80's metal, and I bet the vintage AR's do alright with it too).
Now, if we were talking about EARLY '70's metal/hard rock, that would be different. Wharfedales do that just fine.
I think I know what I want my next speakers to be, but I'm gonna' keep this one to myself for a bit. My interest is peaked though. Something to counter my W90's. The yin to it's yang, so to speak.
Geez, I wonder how Bob Seger's "Against The Wind" sounds through 910's... (I was playing that earlier... That one's not bad at all through mine, but I bet the 910's punch it up just right... I know this recording well... My brother had the LP, I had the cassette, and now I have the old non-remastered CD, which is basically mastered like the cassette... AAD for sure).