I think Brian Allen is the most interesting. He is very impressive executing the reach blocks this team so desperately needs out of their centers. No way do I pay him 10+ mil, but I think a 5-8 mil per range would be something to strongly consider.
OBJ and Von is going to come down to dollars or culture.
Darius is the one I most want to keep but this is his first chance to get paid and teams always pay corners in free agency. I am not hopeful about him coming back.
Sony. I like what he has done. But I would not pay him over 3 mil per.