Stillpoints vs Symposium Rollerballs

jes45, yes...hence the original question (which was never about 'best' or one size fits all; it was more an exercise in learning about other people's experiences).

the responses have been very interesting. i have learned quite a lot. many thanks to everyone who took the time to share their thoughts.

Cab:
Tweaking is IMHO a basic task I perform for getting the most out of my equipment rather from my wallet.

So I have a combination of rolling devices + coupling cones blocks that every once in a while I try to "validate" the current set up. For me is part of the hobby thing in this case.
Currently have cones direct under source made from a special polymer and a bearing type device under the platform the cones rest on. It's about time to cross check them vs brass types !!!! Thanks for reminding me of this.
I have let more worms escape from this can than I might want to admit ...

Well I just tried the "herbies" under my big-ass-monoblocks.--(Refers to CJ 8xs monos) Cain't believe how much they add--all good,btw.(and cheap,too.) Mr. Herbie is giving me .0000000005 cents commision on each million he sells from my recommendation. If you got tube amps, sitting on nothing but an amp stand;I think you will be impressed.