vibrapods or cones?

Why not use both? My favorite "sandwich": Component on top, Cones beneath component, Black Diamond (or your preferred shelf) beneath cones, Vibrapods below the shelf (pods are sitting on your rack). Tune by experimenting with various types of cones; also tune by moving the cones around 1" at a time. Farther apart for more detail, closer together for more warmth.

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.

I second Bob's point. For electronics, including cdp's, try cones under the component and isolation under the cones. The cones will "drain" vibration from the transformers or moving parts in the components and the isolation (vibrapods, pneumatic platforms) prevents vibration from the floor/rack from getting into to compoonent and signal path. With speakers, a rigid coupling to the floor is key. Spikes minimize the contact between the enclosure and the floor, reducing floor-borne vibration, and they prevent rocking or wobbling that can cause time smear from speakers sitting in the floor or on a compliant surface like sorbothane.

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.

Kitch: I have the less expensive Mapleshade cones (Surefeet), but prefer the Neuance shelf (supported on upturned spikes) to the Pod/Maple/cone sandwich that I used to use on the CD player. The shelf is the same or less than the cost of a sandwich I could not use the brass cones under the tube amp as they stored too much heat from the chassis and reintroduced it back into the amp. I still use the Pods and cones on other stuff (since I have them and they are effective), but not on the source and amp in the living room setup which is my pride and joy. I was short on funds (even shorter now:-), so only re-shelved the top two shelves of the rack (the bottom two are still the stock MDF and this is where I still use Pods and cones) and would like to install a couple more of the Neuance shelves down the line. I also had better results with Maple platforms with the Pods and such than with MDF. I think that I will try the CDR dirctly on a Maple shelf with Pods under it, since you have had good results with the thick Maple. I just picked up a beauty (1 1/2" thick) at a thrift store for a buck. If not I can always use it in the kitchen. I think that Bob has more patience than I did with the Pods and cones as tuning them (moving them around) under the source drove me batty after a period of time.