In terms of a "swinging for the fences" draft, I'd be happy to see Looney, Hollis-Jefferson, and Upshaw, and then perhaps an overseas stash such as Mam Jaiteh.
I'd be much less surprised to see Ainge end up with Dekker at #16 and then trade up a few spots to take Harrell and take a chance on a combo guard or tweener wing like RJ Hunter, Delon Wright, or James Anderson ... or like I mentioned earlier, one of the Harrisons.
I agree with the above regarding Portis -- he just doesn't look like a big to me, but he doesn't have the agility, quickness, or jumpshot required to be a combo forward at the next level, either. He has a little of "JaJuan Johnson" syndrome going on. Looney, on the other hand, looks like he has an NBA body already with the frame to add a bunch more muscle and possibly become a stretch 4/5.