 All patients will then receive Dose-adjusted DA-EPOCH-RB for 6 cycles, and if they have at least a PR, this will be followed by randomization to either immediate bortezomib maintenance x 18 months, or to observation, followed by bortezomib if progression occurs. This study has as a primary goal, to describe progression free survival PFS and overall survival of early bortezomib maintenance versus observation following induction with bortezomib followed by DA-EPOCH-RB. Important secondary goals are to assess response and toxicity to bortezomib alone or DA-EPOCH-RB, to evaluate time to progression after receiving bortezomib following progression on an observation arm, and to assess the biological effects of bortezomib on untreated MCL. 