Jan Hibma:
I think it's to do because of the synergy (or lack there-of) between my speakers and Marantz stuff, but I'm not sure. Does anyone have any ideas?
Your kit's excellent so I'd leave those well alone; they're not the problem, moreso if you enjoy what they do with the other music you listen to.
I find Marantz are great all-rounders (which is what good hifi should be IMO) and believe the fault isn't your equipment, but the stuff you're playing on it! I like rock too, listen to a stack of it, but experience of late is too much of it is poorly produced, badly mastered and generally compressed to within an inch of its life.
Good discs aren't hard to find, but I suggest you could *** over to the Steve Hoffman forums and sign up there. Sometimes it can get a bit nerdy but generally, there's a wealth of information and helpful souls who will point you in the direction of good recordings. A few get hung up on first edition Japanese black triangle discs, but don't let that put you off.
Suggestion: if you can find one, get a first pressing CD of Metallica's Black Album - I've got this and play it on Marantz kit which is pretty revealing. It does a fine job. Failing that, get a hold of Yes' "Drama" album - NOT the one which is expanded with extra tracks, but the 1994 remaster (it should say at the top of the back cover "Digitally Remastered By Joe Gastwirt at Ocean View Digital" - sounds great, as do a lot of his discs.
There's plenty to find out there, but depending on what you're tastes are, you might find a lot to like and...on the other hand, you may struggle to get a "good" recording (especially newer acts if the recording process isn't sympathetic). By good, I mean more in line with what you'd like music to sound like, rather than what the record companies think sounds good. There's a mile wide gap on that score.
Depending on your budget, I'd look to some speakers more in line with what the Marantz gear can take (and they'll take some good boxes). Great kit though. You're right to stick with it.