Hey Pretender,
As for the Schiit Ragnarok, or the AVA Vision SET 120, not my beat. I got nada.
As for Cambridge ... I'd group them in with Rotel & the like, meaning IMHO your Reynaud's deserve better upstream components.
As for Rogue Sphinx, I'm not familiar with that model. I am familiar with Rogue's Cronus Magnum, but now you're back to tubes. That said, the emphasis on the Cronus above it's other attributes was it's value for the money, not it being part of a sonic coterie. Potentially this could be altered to a given degree by swapping out the pre-amp tubes with NOS tubes, and then again with a snob capacitor upgrade. But there goes your budget.
Parasound .... you're onto something there. John Curl has a reputation for a reason. Question is which one of his designs is optimal for your application. The Halo Hint 6 integrated amplifier is there premiere piece, but you may be using an elephant gun on an elk hunt. They're NewClassic 200 Integrated might suit your application better. Take note that Hi-FI sound shines when it's being pushed to a given degree.
In choosing your purchase concern yourself less with features. Instead steer towards quality of power supply, type of capacitors, transformers being used, binding posts. Contact a Parasound Rep, gettem on the phone, build a rapport, lay out your questions, and tell him you want the best without being up sold.
This is all dependant on your listening room. If you have a fair sized dedicated sound room with better than average acoustics, knock yourself out. You can justify the added effort/time and expense. If you're in an L shaped room, or your gear is being put in the wife's tightly packed Victorian tea room, save your money, the results won't be there.