Jaime McMillan sounds like a strong candidate (for Immigration Reform, Anti-Drug War) for Colorado, hopefully he makes it out of the primary.
He'd have to get his name recognition up in order to make it through the primary. Right now, he doesn't even have a Wikipedia article.
He does sound like a better fit for the state than the other declared candidates, though, from what you've said.
He might have a problem in the primary though, as he's pro-choice
I'd say this is still Lean/Likely D, especially since a loon is likely to take the nod (I wouldn't be surprised if Ken Buck wins this outright).