Flipped by a whale Tues

[Jim Sammons LJKF]

Ok lets look at this as a worst case scenario. You get dumped into the water and bonked on the head. As you now know first hand crazy things happen fast. I have had free jumping Threshers launch over the bow of my kayak. Inflatable PFDs won't save you if you can't inflate it. You are much safer in a normal PFD.
IF you are going to be thrashing around in the water for an extended period not having a belt could also be an issue.
Just my thoughts but I would at least reconsider your choice of PFD. I know those inflatables are comfortable but I think comfort will take a back seat to floating when it really counts.