I think Zoubek is overrated. His offense has regressed every year, and while that won't be his calling card in the NBA, he's one of the worst offensive centers in the NCAA, so I'm not sure if that would make up for his other strengths. He pretty much never touches the ball outside of offensive rebounds, and this might look worse in the NBA. His rebounding rings flukish--he's really rebounding well this year but if history has any say, he's more "good" than "great". But what really irks me in particular is his poor blocks/foul ratio--he's shown some ability to be decent in shotblocking, but I think he's more poor to decent than decent to good. So while he has the height, and maybe the rebounding, he's so poor in the other areas, and there are many players like him, that I don't think he stands a chance in the NBA. I don't think he can just live off several good tourney games, because his first three years in Duke were so nondescript. Someone will throw him a camp invite because of his height however. Honestly I think Hilton Armstrong was a better college player, and that's saying something. And my vitriol for Hilton has been well documented.
Varnado is okay. He's only an average offensive player with questionable shooting ability and fairly limited usage rate, but he's capable of finishing and getting to the line solidly because he's active. He's also a far better defensive rebounder than offensive rebounder, something that with his slinky frame (6'9" 210) might not really translate to the NBA level as well. But he's a very good rebounder for his position. But where he really establishes himself as the NBA prospect is through his shotblocking--his body of work through four years of college here has been absolutely stellar, and better yet he does it without fouling. But we've seen cases of players of that ilk (Shawn James, Stephane Lasme) who haven't translated that well into the league, and between the average offense and the potentially untranslatable rebounding/tweener body there's a reason he had to stay all four years in college. I think he might make a role as a hustle player who can bring the occasional shotblocking and frenetic rebounding, but he needs to land in the right situation. Probably a late 2nd rounder.