How to improve my system : Shunyata Hydra ?

Hello,
I hope someone can give me a few hints or things to consider !
My system consists of Krell KAV-300iL, cd player Cary 306/200, speakers Avalon Opus Ceramique and the cabling is entirely from NBS Omega I (interconnect and speaker cable) except for powerchords, which are NBS Monitor IV with Furutech rhodium plugs.
The speaker cable is new and replaces the Nordost Valhalla I had previously. The Valhalla was nice, but I had the impression that it was - to borrow a comment from someone else - a "bass thief". So I decided to buy the NBS without having the chance to audition it. It has got now roughly 150-200 hours, but it is nowhere near compared to the detail and imaging provided by the Valhalla. And the Valhalla were louder, perhaps due to the low impedance. I spoke with NBS and they were surprised. Is the mating with the Krell so bad ? My question is how long should I wait for the NBS to open up or what is causing the problems ?
I'm wondering if getting a power conditioner such as Hydra-6 + Python Alpha or Hydra-8 + Python is going to help me. Should I take the plunge and buy Shunyata's Hydra or not ?If yes, what model (Hydra-6 or 8) would work best with my set-up (I don't need more than 6 outlets) ? Unfortunately I cannot audition the Shunyata... Any recommendation or ideas ?
cheers and thank you for any comments which might help me to overcome a bit my frustration.
Mike