I'm looking into either a Dr.D with a quiet core or a FMF Q2 silencer for my 01 YZ426. I currently have a Thunder Alley pipe and I love the low end power, but it's too loud. My riding buddies can't tell if their bikes are running or not when I'm around. Is it possible to quiet it down, without sacrificing that low end power that I've learned to love? What are the pros/cons for the Dr.D with quiet core and FMF Q2?