Hey RD it sounds like you've seen all these guys pitch a bunch of times. With Hultzen, it seems like he's able to get a good amount strikeouts with his arsenal of pitches. You mentioned he had really good command, also. His UVA bio has him at 6'3" and 200 lbs - http://www.virginiasports.com/ViewArticle.dbml?DB_OEM_ID=17800&ATCLID=3634293. So he's not a monster like Sabathia, but he's not tiny, either.
I don't know one way or the other and I know I'm not an expert on this stuff, but a lefty who throws in the low nineties with outstanding command who strikes lots of people out while not giving up lots of hits sounds like a really good pitcher to me. The fact that he's a good hitter and is from Bethesda, MD (also in the UVA bio) are just bonuses to me. If he keeps up his performance, I'd be pretty excited about him if we took him at 6.
He got a couple of hits off of Strasburg in the NCAA's in 2009.