I think it's waaaay too early to call Darko a bust or 'Melo a superstar. Time will tell.
Darko is a project, very talented, very raw. In other words, exactly what the Nuggets didn't need right now. They already drafted two of those the previous year with Nene & Skita.
What the Nuggets needed was someone who could not only step in right away and contribute, but someone with some name recognition who could help get the city excited about the team again.
'Melo was a perfect fit. Coming off of The Orangemen's run to the national title with 'Melo being named Final Four MVP, everyone knew him and everyone wanted him in a Nuggets uniform.
They got him, season ticket sales are up, wins are up and the general attitude in this town towards the team is up. He's not the only reason for all of that, but he's a large part of it.
Right now I would have taken Melo, but in 2-3 years who knows. I might have even taken Darko ahead of Melo if his workouts were really promising. Kiki loved Darko and really wanted to land this kid. Some "experts" say he has more potential to be better than Bron, just give him 2-3 more years.