Based partly on Ben's review, I picked up an RRS TVC-33, PG-02 LLR gimbal for my 600 II, and a BH-55 LR for other lenses, along with an MC-34 monopod and MH-02 head. Awesome. I subsequently picked up their travel tripod setup (TQC-14 + BH-30 LR), awesome in a smaller package.