Congrats on your purchase.
I currently use symposium rollerblocks (series 2+), double stacked with grade 3 balls on a symoposium isis platform. Personally, I think this approach works quite well but results may vary due to system configuration and personal preferences. I use this type of mechanical grounding throughout my entire system! The resolution in the highs and mids is simply unbelievable with the rollerblocks in this configuration. Transients and dynamic swings are also reproduced very well. If there is an issue with these rollerblocks ... it is that they tend to add some metallic tinge to the highs (very slight but present). This is probably due to the fact that symposium acoustics use metal in the bodies of the rollerblocks and also in their isolation platforms. In some systems, the overall sound may come across as too lean after the introduction of these rollerblocks ... but this is not the case in mine.
I've heard the capitole with the black raviolis at Globe Audio. Although the listening session was very brief, what I heard was a more CORRECT sound but also a slightly less resolved sound compared to the rollerblocks. I may be biased in favour of the rollerblocks ... having spent quite a bit of time with them in my system. Overall, the entire frequency range seemed more balanced with the black raviolis. The music had good energy, a low noise floor and was quite palpable with these things under the player. I will defintely try some in my system; my understanding is that the sound improves further once the pads and the components settle down.
There are 2 other products out there for the capitole. One is the SRA Ohio XL isobase and the other is the Critical Mass Master Reference platform. I don't have any exprience with either of these so if any owners come across this post please feel free to share. Both products are generally well regarded ... but VERY expensive compared to the raviolis.
Powercords tried on the capitole:
Cardas Golden Reference (brutal, too slow, rolled off at both ends)
Revelation Audio Labs Precept (very good match after break-in, even though it's silver)
Shunyata Black Mamba v2 (the upper mids and highs had some timbre issues with this cord, bass was overdone)
Shunyata Anaconda vx (excellent powercord for this player, one of the best)
Electraglide Epiphany X.2 (also an excellent powercord, more organic but less clear than the anaconda vx)
Kubala Sosna Emotion (my favorite)
It is worth mentioning that the Nirvana powercords also match very well with the audio aero players ... one of the reasons Globe Audio uses them. People could save a lot of money by using these reference level cables throughout their systems. Unbelievable value for the money!
Good luck with your search ... I hope you will find the right combo for your system.