Options for a dog that screams at other dogs?

I have a 4 y.o male, neutered Boston Terrier. He is not dog aggressive (we take him to the dog park and he's fine) but he is highly dog reactive when on leash. Whenever he sees another dog he either freezes or tries to take my arm off trying to get to the other dog. I could deal with that because he's only 28lbs but he does this horrible, high pitched scream when he sees another dog. It's sooo loud and it sounds like I'm kicking him in the ribs or sticking him with a hot poker. It's frighting and of course every one thinks he's mean and won't let their dogs anywhere near him. Anyway, too make a long story short we just moved into town and into a fairly populated neighborhood and this behavior is not acceptable (not that it ever was but at least he didn't run into a dog very often before). We've tried training cles and personal training once before and we are currently doing it again but we have not gotten any success with the screaming issue now or in the past. I DO NOT like prong or choke collars but it's gotten to the point that I'm considering a prong collar to give him corrections when he does this because nothing else has worked. I also looked up information about debarking a dog and of course just like the prong collars some people swear by it and others want to string you up and burn you at the stake for even considering it. Something has to change though before we get run out of our neighborhood. I just want some opinions. Has anyone used prong collars or debarked their dog? Have you used any other solutions that have worked on controlling a very reactive dog? I hate the idea of even considering a prong but all of his positive reinforcement training hasn't done a damn thing for this particular issue.