Have you tried Ovol? I haven't tried the other brands you mention, but Ovol seems to work pretty well for us. My son is also a gassy boy - he is 4 months old, and still often has one episode per night after a feed where he kicks his legs around a lot for a while after the feed. This doesn't seem to be as much of a problem during the day since I have him upright after feeding, so all of the burps come out eventually. He can take quite a while to burp sometimes (e.g., during the day I might hear a burp come out 20 minutes or so after the feed), so the quick burp I do in the middle of the night probably doesn't get all of the gas out. The reaction you're describing could also be reflux, which you could ask your doctor about.