I just use a regular Max-5 camo life jacket that I picked up several years ago from Bass Pro for duck hunting. It works great and I don't find it to be to bulky. I have an Onyx auto inflate that I use bass fishing in spring and summer. I really like it, but just stick with the normal one come duck season.
Whichever one you'll wear. I know that's not the answer you want to hear. I'd go somewhere, bass pro, cabela's, somewhere you can try them on and see which one you like. I can tell you when it's cold, I don't mind a standard life jacket. It helps cut the wind and cold air when boating in.
Waterfowling and sugar tablet style inflatables aren't a good mix. Too much chance of accidental inflation. Just get a camo life jacket cut to allow for paddling if needed.