Well rap and rock have a lot in common these day really... most rock acts have pretty repetative music... so when you say you liek rhymes but as long as they got riffs, you mean that if beat is made with guitars it's cool, but if it's made with turntables and keyboards it's not? Well ok, as long as yu enjoy it.
http://www.onebigtrip.com/vers_3/flash/soweto.html
Here's a cool video from Del's group, musically it has very nice guitar riff, and in general sounds really nice, girl who sings hook has great voice unlike most rap girl u hear in radio (and is actually dressed lol). Defently a great un-radio song.