Dive Rite makes some very good equipment. If you go with the Backplate, get the one piece webbing, not the deluxe one. You don't 18 D-rings, 3 to 5 is all you need.
For wings, If you diving singles, get the BC jr (which I think is now the Trek wing), for doubles, get the Classic - you don't need the shock cord on the wings. Also, don't get the pull to dump cable, go with the standard elbow. Reason being, one day you yank on that thing and it comes off in your hand.
For the RG1200 - Never dove it, but I hear it is a very good reg, breaths great, and low maintenance.
Eric