Assuming Marcus Lee is coming back nest year because he needs to develop physically, I'm not terribly worried about the frontcourt. We need another body or two, but I think Towns is going to be able to be the go to guy in the front court and Lee can take care of help defense, so i'm not sure it matters which one we get as long as we get one of them. If Dakari Johnson also comes back next year, the frontcourt will be stacked either way.
I'm more worried about the wing spots now that we have Ulis at PG. I hear good things about Blackmon, but I think we really need to get Blackmon, Booker, and Stanley Johnson if everyone who is expected to leave after this year goes. Certainly we need 2 of the 3. If Aaron Harrison or James Young stays, that changes things completely, but I'm not expecting that. As it stands now assuming everyone who is expected to go pro does, the only wing UK has for 2014 is the walkon E.J. Floreal.
I'm also interested to see how Calipari uses Ulis. I can't remember the last time he had a small PG, even going back to Memphis he has always used PGs with size. Some two man game with Towns and Ulis should be fun to watch. That is one pick and roll you definitely can't switch, no matter who the defenders are.