i don't know about RHCP... it seems like all their more recent stuff sounds exactly the same. their old stuff is great though.
i've always found blink-182's last album (self-titled) to be extremely well produced. it has tons of different sounds scattered throughout the album, and the mixing is spot on. also, travis is easily one of the best drummers ever, and i often hear little fills or highlights on my ascends that i never heard before on other speakers. i know a lot of people think blink is too childish to listen to if you're over 16 years old, but the self-titled album has a lot more maturity to it than the rest of their music and is definitely worth a listen on a good set of speakers, like the ascends.
CMT-340SE2 Mains & Center, CBM-170SE Surrounds, Rythmik F15, Emotiva XMC-1, Emotiva XPA-5