Righunter had some very good advice and I second that. I do not recomend purchase other then dive shops where you can get quality advice,fit, and service. Ask your local shops about trying out the equipment, There are alot of quility BC’s on the market, purchase per your diving goals, Rec,Tech, or Pro. Do you Have a local shop where you train, many shops require use of there gear by there staff, something to consider. I use Auaqulung/Seaquest products Have a Pro Unlimited, and plan to go with the WTX Technical setup as I get ready to go that Direction in diving.