Angeli is accurate, can run some. Strong enough arm. Minchey brings the run threat, but doesnt seem as accurate. Carr looks like the most potential to me arm talent wise and accuracy. Havent seen him run but they say he can, but probably not as well as Minchey. He's possibly the best passer, but Id imagine still learning the O. That is, all from the limited amount we've got to see.
I'd personally be fine with any of them. Angeli has talent. Seems to be a winner. It'll be a real spring ball battle I'd imagine. It's going to depend a lot on how they progress Id think. Probably matters a bit on how porous or not the O line is too.
Right now I'd put my money on Carr, but I think it's close.