Out of the mouth of babes . . .
Individually, I might not have selected the Transplate harness, simply because it is a 'deluxe' style, with more D-rings than necessary, and pivot rings on the shoulder straps, none of which I find to be necessary. But, I have dove one, and they work well. The SS BP - good choice for the majority of diving you will probably do. In some cases, divers may find that the SS BP is a bit heavy, if they are inherently negatively buoyant, and/or are diving warm water with no exposure suit. But, for many (myself included) a SS BP works fine in tropical conditions. And, the 45 lb Rec Wing, while a little on the large side for warm water, single cylinder diving, will give adequate service. Go out and dive with your new gear, and enjoy it.