Top of my wishlist would be: BECK...
Both, the Roots and Beck come up with something totally different on each LP. They embrace genres of all kinds and as we know, Beck has always been fond of Break Beats and rapping. I think, together they could bring Hip Hop to a whole new level. And didn't ?uestlove list The Information as one of his favorite LP in 2006 (correct me if I'm wrong, but I think he was no 2 on his Top 10 list)?