I have only owned one in my life and it was made by a local smith and it SUCKED! Vais is supposed to be good but I also heard that harrells brakes are good. they are much cheaper than vais too.
I have a titanium brake on my 300RUM but its from christensen arms. Im not sure if they will do a normal barrel or if it has to be carbon fiber. Id give em a call it sure works good though.