300 whisper barrel

[Barsmash]

I just got my Remington 700 action in and I am going to be sending it out next week to have a 300-whisper barrel put on. I have one question for all your guys out there. I have been reading and getting mixed results on barrel length. What if any advice cans you give me? I have seen 16" all the way up to 24". Please help as this is the first custom rifle I am building and I want to make sure it is right the first time.
Andy