Rondo/Collins for Stuckey/Monroe and their first rounder.
Stuckey/Monroe gives Boston a much bigger team and they fit a half court style that Pierce, KG, JET, and Courtney Lee would all fit better in.
Rondo and Knight would be a small backcourt but they would run all day. With younger guys Drummond, Jerebko, and Singler coming up, that might not be a bad deal.