Habs are pretty freakin hot with very little flavor discernible from the heat. I don't know why you'd smoke them, personally I'd not smoke anything hotter than serranos or jalapenos. In fact jalapenos smoked have tons of flavor, so why not use those and a dab of fresh habanero for extra heat if you like?
I dunno, I guess my beef with habaneros is that they're a macho thing thrown into foods so people can say "I ate some habanero such-and-such." Unless you're immune to blistering your mouth then you'll never get pepepr flavor and only heat from habs since you must be so sparing with them.
(P.S. - At a college party in Austin I met a guy eating them fresh from a bag by the dozen. I figured they had to be fake since he was so casual about it. He offered me one and I stupidly chewed it up. Guy was a freak of nature or something! That said I love raw jalapenos and can eat plenty of them.)