Probably my favorite MF Doom-related project, Madvillainy is my second favorite hip hop album ever I think. They're working on a follow up too so that should be fantastic. Four Tet's remixes of Madvillainy are really good are too.
Reccomendations:
ALL CAPS
Accordion
Meat Grinder
Bistro
MySpace.com - Madvillain - US - Hip Hop / Hip Hop / Hip Hop - www.myspace.com/madvillain