Originally posted by netboy79
I also hear that a back inflation BC wont tend to rise up and have the shoulder harness turn into a head harness. Any input would be greatly appreciated.
Research, research, research! This is a good place to start. The real issue that causes a BC to rise too high is whether it is weight integrated or not. If you have a weight belt to pull you down and your BC is trying to float your butt, then it will be a tug of war and the BC will slip higher and higher. A back plate and wings overcome this with a crotch strap. I like a crotch strap and that is probably the ONLY drawback to my Chute II. You can also minimize this by optimal weighting. An overweighted diver will really feel the "ying and yang" of their equipment.
While a back inflation makes you horizontal at the surface, that is a real plus while under water. Your attitude should be as close to horizontal as possible. As UP pointed out, the trick with a back inflation is to be horizontal on your BACK when on the surface, and the heavier tanks help to achieve this. Even with AL tanks just a little bit of balance will keep you out of the suds.
The back plates are not as evil on your body as they look. You might have some discomfort out of the water, but hey... you should buy for while you are IN the water. I own an OMS IQ, a back plate and 55# wings, an old Sherwood vest style, and the Oceanic Chute II. Each has it's place and they all work fine... with the exception of the old Sherwood... It should become an artificial reef somewhere.
Still, the best way is to try different styles and many LDSes will rent what they sell, and some even have a rent to own deal, and some just don't care. Many will try and "convert" you to their style of BC... they are not the ones who will have to live with your decision. Use your head and you will figure out what is right for YOU.