What you deem "high quality", most here deem as trash. However, there may a couple of rap sounds I actually like, mainly from the early days. "Planet Rock" (by Soul Sonic Force?), one example.
What I deem to be the better hip hop tracks may be deemed "trash" by most FReepers - but that is a meaningless point, because most FReepers have never listened to the tracks in question and therefore have no experience on which to ground their opinion
Like most popular "rock" and pop performers (Nickelback, Lady Gaga, etc.), the most popular hip hop performers - like Lil Wayne, Young Jeezy, Kanye West (as an MC), David Banner, etc. - are generally the least impressive artists the genre has to offer.