Well, I like and listen to some hip hop, but I'm still going to say that in general SQ doesn't matter too much for this genre. To me, on the vocals (as much as I like some of it) there's just not the subtlety there that demands audiophile quality recording. It's not the same as someone singing, where pitch comes into play, as well as timbre etc. And the other portion of hip hop recordings, the production (ie. music/instruments) could in theory benefit from good SQ, but in practice it's hard to really achieve, or even pin down. The reason being, what you're hearing there is actually (in most cases) a recording of a recording -- samples. So even if the guy putting the end product together wants to pay attention to SQ, what he's working from is not often a direct, high-rez digital recording, and never original analog tapes, or anything like that. Most often the source of the sounds is a beat up old record. And just culturally I don't think much attention is paid to SQ by the people who make hip hop music.
So that's a long way of saying, no I don't have any hip hop that I'd consider to have great SQ. But that's OK. I will say that my favourite way to hear that kind of music (and many others) is on vinyl, since it has that full low end that really works well for it.
I also know that some Ice Cube CD's were reissued in the HDCD format, but I've heard they sound terrible. Also NWA's were too I think, haven't heard anything about those.... that sort of thing's not really my cup of tea.