well since you are posting this in the wakesurf section check out agenda's new jacket. super flexable and easy to wear. Not sure that you can use the words comp vest and bouyancy in the same sentence though. the agenda vest will float you but not like a real PDF.
The ronix capella is good and so is the Hyperlite Murray. There are some quality issues that I have heard of with ronix jackets but mine all hold up pretty well.