I have used both the 7" Doinker and a 4" Stealth, and the Stealth removes more shock and vibration along with noise than the Doinker. The Doinker is a nice stabilizer, but the Stealth is more versatile as it can be reversed to get a better balance. Along with that, buying a Stealth will mean that you are supporting one HECK OF A NICE GUY. Jerry (the owner) actually visits these boards and he has turned out to be a pretty good friend of mine and we talk regularly.