Bag options: - Topeak MTX TrunkBag DXP 1500ci REI:$85 Amazon:$62 - Topeak MTX TrunkBag DX 800ci - Topeak MTX TrunkBag EXP 1030ci - Topeak MTX TrunkBag EX 430ci Rack options: Weight is basically the same among the Topeak mounts (680g for BeamRack, 620-739g for various normal racks). Except that the BeamRack can't do panniers. So that's an obvious choice.