Wes is an incredible player and performer, and his ear for killer tone is next level. Love the dude's style and whack stagecraft.
As for:
Lest we forget some of the most kickass bands incorporate rap into their singing/lyrical compositions - and a lot of 'em have amazing artists/amazing guitar tone (RATM, Deftones, etc).
I'm 100% down for rap - 2Pac being a legend - but as for incorporating it into the heavies, so long as it's done well, I'm down with it 100%