Mike, I've written this in another thread, but I'll repeat it here. I have read comments from users, reviews from reviewers, and I have corresponded with owners of Hydra conditioners, and there is rarely a consensus about which Hydras work best as one moves through the product line. Personal taste and system synergy play an amazingly important role.
You were told the Hydra 2 wouldn't yield the same results as the Hydra 8. In what respect? I use two Hydra 2 conditioners with excellent results, but I will admit I haven't tried a Hydra 8. "Jadem6" uses an original Hydra, and does not like the new Hydra 8 or the Hydra 2. A reviewer loves the new Hydra 8 and says it sounds different than the original Hydra. Better? Not necessarily, but different.
So, it sounds like you are going to have to roll the dice to some degree since you can't audition these products.
Personally, given the choice, I'd go with a Hydra over a PS Audio product based solely on my personal experience with products from both companies, but I can assure you there a plenty of satisfied users of PS Audio products who will disagree.
If you buy either product used, you will be able to re-sell without getting hurt too badly. That's my suggestion, unless buying used is not an option for you either.
Lastly,regarding cords. Since you can't audition cords, the safest route would be to buy a Shunyata cord if you're going to buy a Hydra conditioner, because of system synergy between the Shunyata products, and because of re-sale value.
Owners of the original Hydra almost universally agree that a Shunyata Vx series cord is best used to power the conditioner, and owners of the new Hydra 8 almost universally agree that it should be powered with a Shunyata Alpha series cord. This is Shunyata's approach, too.
Good luck.