My I ask for recreational diving why a SP Hydros Pro rec style BC combined with a tech style 7 ft long hose primary and presumably a short 20-24" necklaced secondary? I prefer primary donate, but that's a really long hose that has to be managed and presumably you're not going into overhead or narrow passages where single file air sharing is required.
When I rec dive I use a 5 ft long hose and there's no slack around my torso (5' 10", 195 lbs male) so I don't have to change muscle memory between rec and tech diving. If 5 ft is too short there's also 6 ft LP regulator hoses available, but hard to find. Before I went tech I dived primary donate using a 40" primary hose w 70 deg angle that just goes under my right arm, which is really easy to manage. It also makes it easy to switch between primary donate and octo donate if for some reason your dive buddy cannot deal with primary donate.
When I tech dive w a 7 ft hose I need a hose retention stick to tame the long hose. If I try to tuck the long hose into my belt it always comes out and floats around - really annoying and not good inside a wreck.
My rec BC is a Dive Rite Hydro Lite. It's basically a 30 lbs single tank travel donut wing sewn together with soft backplate and 2" adjustable webbing harness. It has full sized D rings and quick release weight pouches. The best part is almost any standard accessories that will fit 2" webbing will fit, like pouches, D rings, triglides, cutters, knives - including a 6-7" plastic hose retention stick. A really flexible system that mimics a BP/W. If one day you decide to sling a stage/pony tank for deep wreck dives, being able to add D rings and other hardware wherever you want is pretty useful.
Me personally, I'm not a fan of integrated quick release weight systems that use a proprietary pockets to hold the weights. If I ditch weights in an emergency, my expensive pockets are now gone and I have to use a weight belt until I can obtain more pockets.
