i got the red (diesel) powerflex one on my vrs.. took a couple hundred miles to bed in and it dont even notice it now.

that one is slightly softer than the superpro and powerflex offerings.

So not a bad idea, mine always had slight vibration, but hey thats the way i like it...

seriously tho, i just adjusted the idle in the end through vag.com as idle was right at that sweet spot where everything shook to bits.