Ok, I don't want to stuff a backplate and wing down your throat but that is a good option.
I think the best thing you can do is try as many different styles as possible before purchasing. Jacket, back inflate, and a bp/w are your main options. Some jackets were reccomended above. Zeagle makes some really good back inflates and bp/w's are pretty much the same with the exception of small differences in wing design. Hopefully you will have access to different bc's during your OW class and can try them all. If not most people will let you try thier bc if you are nice.
Congrats on your upcoming OW certification!
