I think the Cavs should go with Beal, MKG or Barnes at number 4. There's no need to go with a risky pick. You could pick TT at number 4 last year because you picked Irving at 1. This time you can't mess up the number 4 pick because it could set them back for years. This is an important pick.
The three players I'm talking about would come in later rounds. First my preference for the number 4 pick is Harrison Barnes.
24. Evan Fournier - A SG that attacks the rim and has a pretty jump shot. He's an international player that San Antonio would pick while other teams will miss out. He's a 6'6 shooting guard who you could also play at SF when you want to go small and quick. Here's his video.
33. Kyle O'Quinn - A 6-10 Center who can knock down a jump shot and bang in the paint. Of course you have to look at Festus Ezeli if he's still on the board. O'Quinn can run the floor and he would be a perfect fit with Andy and TT. Watch him bang in the paint and shoot three's in this video.