vince is typically a stud fantasy player, when healthy of course. all indications are he's been healthy, and I assume he'll play extra hard (wanting to increase his trade value, and thus the chances of him leaving toronto). If you can get him for A. Miller, do it in a heartbeat.
The other one, IMO, is a no-brainer as well. prince is a dime a dozen sf, who can only play sf, won't be asked to do much scoring. seriously, he's 10th round material at best. okafor has huge upside. he could very easily pull down 10 boards and get 2+ blocks/game this year. And, since he's a C, there's very little risk being that there are only a few centers who can walk and chew gum at the same time. You gotta take a chance on a center IMO.