Last Cut For My All Time Dolphins Team

I am a Bills fan, but I am making all time teams for the other, lesser, NFL squads during the offseason.  Just kidding - jealous of the super bowl wins.  Almost done, but saved the biggest rival for last.

I am getting close to finishing my Dolphins team, but still a couple players over.  I need to cut 2 DBs, and I'm trying to decide between Glenn Blackwood, Louis Oliver and William Judson.  Any insight from you true Dophins fans would help. 

One other question.  Who do you think is the best tailback in Dolphins history?  Tony Nathan may be best all-around back, Mercury fastest, Ricky Williams best power back (earlier in his career) and Jim Kiick and Ronnie Brown factor in too.  I'm leaning Mercury, but can be swayed.

Thanks