The M60's are usually the speaker of choice for most tower buyers, because of their amazing clarity. But if your friend is going to be cranking stuff like Tool, and Rage Against the Machine, then something a tad more subdued, like the M50's would probably be a better fit.
I asked about the Paradigms because I had the chance to hear a pair of the new v3's and was suprisingly unimpressed. It could very well have been something with the setup I heard though, as I've always heard good things about Paradigm.
