the new PFDs are made to be comfortable and not interfere with casting. they have extra room around the shoulders.
NRS, Astral and Stohlquist have amazing PFDs. i have the astral ronny fisher and altough its a bit expensive, it is comfortable and has tons of extra storage for fishing stuff like pliers and such
I can vouch for that. I've got a new Stohlquist and I forget I'm even wearing it. Definitely worth the extra cost. Wear your PFDs, guys!