I have been diving a Halcyon SS plate w/ Eclipse 40lb wing for the past year and absolutely love the rig. Went with the 40lb because I dive PST 120 and 100 lb tanks routinely. IMHO - all of the wings and backplates on the market are solid - especially Halcyon, OMS, and Dive-Rite. Buy what you can afford and you will not regret the decision to move to BP/W with any of the above choices. I will echo a previous post - single wings are for single tanks and double wings are for double tanks and there is no in between - no matter what the sales people tell you. For doubles I own the Halcyon Explorer Wing...