RG3 is no longer an option for the Miami Dolphin, but he would have cost FOUR first round picks anyway!
"In the deal, the Rams will receive the Redskins' No. 6 overall pick, as well as the Redskins' first-round picks in 2013 and 2014. The Rams will also receive Washington's second-round pick this year in return for the second overall pick that the Redskins now will use on whichever quarterback the Indianapolis Colts do not draft No. 1 overall."
http://espn.go.com/nfl/story/_/id/7668243/source-washington-redskins-acquire-no-2-overall-pick-st-louis-rams
"PRESENTLY", Only Peyton and Flynn are legitimate remaining options for Dolphins !!