Horn Help!!!

Hey there. I have an air horn on my truck. It is a true air horn with a tiny compressor, buy no tank. It is made by the same company as that first page you have up there. The DB level is kind of bogus on these horns. It may say 118DB or what ever but that is most likely rated at the horn exit. To give you an idea of how these ratings may compare, a jet engine is rated at 120DB. My air horn is rated at 120DB and it is not much louder than the stock horn. This does not mean that it does not sound totally bad a**. When ever I use it people are looking over their shoulders as if they were about to be run over by an 18 wheeler. So what I am getting at is, with these horns you will most likely not get a much louder horn but it will still be loud and very audible. If you are going for the sound, then either of those horns would be just fine. My buddy has the "awoogaaa" horn on his Durango and it sounds great. I may have time tomorrow to post some sound clips of my horn. I know it is not what you are looking for but it may give you an idea of how loud it may be. Good luck with the search!