If you say "deep listening", jazz comes to mind, blues, quality rock music, classical music, etc.
While i like hiphop a lot from a musical point of view, i agree that the music itself doesn't sound very "deep". If i want to listen to "quality music" (my roots are still rock, blues and jazz) it's usually not hiphop i'll put into my cd player.
I think the main difference is that what i call "real music", is played by real "artists" with real instruments. However, i'm open minded when it comes to music... if you can make amazing music with a sampler, i'll end up saying it sounds nice too.
So when it comes to listening hiphop just for the music, it's usually the more complex stuff (for an attempt at "deep listening"). Jazzy hiphop is something you could try. The Jazzmatazz albums from guru are nice for example.
The Roots is another band who actually plays their music with real instruments. Aswell as Pete Philly and Perquisite.
Nujabes is a guy who did some really nice stuff, but it's sampling again.
You might also want to have a try with some stuff that Ninja Tunes put together. It's a label that features many different artists. I found out about The Cinematic Orchestra throug them, but that's already going into another music direction/style...
