RE: Mathews drenalin or bowtech guardian
I have shot both, and I own a Drenalin. That being said, I had narrowed my choice down between those two bows .... it was a tough decision, and I would have been happy either way, but what Greg said is what my experience was.
As far as quiet ... once ya get 'em both all dressed up, not sure you will notice a substantial difference.
If ya can't decide, flip a coin ...you won't be sorry either way!