vibrapods or cones?

I just today put vibrapods under my tube amp. There's a noticeable buzzing vibration when you put your hand on the base, from the transformers, I suppose. The pods should isolate that from the rack, and perhaps isolate the amp from any feedback (sympathetic vibration?) effect the vibes have on the rack.
I'm still trying to decide whether what seems to be a little smoother sound is really smearing detail.
For certain, vibrapods under the CDP resulted in greater fine detail.
I've always used cones under speakers and turntables, a no doubt improvement.

David- you want to talk cheap, I've got all my wires off the floor with bits of cardboard! Not that I hear any difference. But it's de rigeur.
I'm currently building a Foreplay pre-amp from Bottlehead (Electronic Tonalities). One of the big tweaks is to isolate the transformer from the chassis with rubber grommets. That requires a separate grounding scheme, however. Another is to cut a mirror image of the top plate out of keldamp to put underneath. I don't know about damping the tube pins although there must be some vibration inside them. Having installed tube sockets, I would say that there would be a better chance of isolating the sockets themselves as they are grounded in the wiring scheme and not by attachment as are RCA's and such.
I may try some more pods under the newly acquired Monster 2000.

CJ of CJ's AudioVideo, my source for Vibrapods, has been trying to get me to try the sandwich thing with MDF. I was put off, though, because originally my flexi-rack had MDF and the system was unlistenable. The 1 1/2" thick maple shelves I use now are at least neutral. I suppose I'll have to donate, what, $150 to Caterham's used Lotus fund and get a Neuance shelf. What do you guys like for cones? Pierre Frey tried to sell me $125 set of his Mapleshade cones. As good as the speaker cables are, I don't know.