Speakers for Rock

I once auditioned B&W DM603 and I thought they were fantastic rock speakers, but a little bit unrefined for classical. They would partner well with less expensive electronics such as NAD, Rotel, Creek, and would probably be a lot of fun. I bet the DM604s are pretty fun too.
Also look for Mission 753s if you can find them used.

You need to give your price range .. people here throw around krell, levinson etc. like we all have that sort of money.

I'm surprised noone mentioned that B&W CDM9s are a league higher than rotel separates. Rotel makes good stuff, but not in the same league as CDM9s.
I'd be careful to make sure that you audition the speakers with the amp that you'll be driving them with. Otherwise you might find you audition CDM9s with $2-3k of amplification driving them (they'll sound fabulous), get them home and hook them up to your rotel kit and be severely disappointed.

I'd suggest in the B&W line rotel will match up well with the DM603s or 604s, and you'll have to step up to Bryston, Arcam, Creek, Naim or better amplification before the CDM9s are a good match.

but the main message is make sure you demo the whole system before buying parts. $2500 speakers driven by a $800 receiver will likely sound much worse than $1500 speakers driven by a $1500 integrated amp.