Check out the link below and look at Nate's V-port brake its the one I use and works very well. Any of the baffel style brakes work well , the big JP is very effective but very big and I think it takes away from the rifles look. JP also makes a Benni Cooley brake that works well and is not as big
Its unfair for me to say that one is absolutely better than the other without actualy shoot them on the same gun.
I have used a big JP brake on two guns and I would say that their are probably the most effective due to the huge first baffel and chamber that stripps off and redirects the gas. The price you pay for this great effectiveness is size and looks. If you don't mind having that thing hanging off the end of your gun then get it or if you want the absolute most reduction possible as any cost. But if you want a great effective brake with good looks that will be installed perfectly Nate's brake is a great choice. the other baffel style brakes will all work well it realy jst boils down to what you want.