I liked the looks af that v8 - designed for ventilation is interesting.  while I normally wear my pfd all the time, this year was so hot and relatively calm on the lakes, I didn't wear it half the time - so the ventilation features sound pretty good.  also, it seems to have a full back panel which allows for a thinner front (less bulky in front) - the Bahai on the other hand, seems to be designed for kayaks, which generally means a thin back, so most of the flotation is in the fron, making for a bulky front.  I have a Patagonia pfd like that, and it is maybe 3" thick or more in the front before putting anything in the pockets, which I find to be a bit of an inconvenience, though not an overwhelmnig one.