I owned a Raven Osprey but moved to SS due to speaker choice. It is a very well made, sweet sounding amp. In a lot of ways I miss it. If you buy new you really cant go wrong with the 45 day trial - the restocking fee if you change you mind is fair IMO.
I have no experience with Fezz.
The Schitt Skoll is great value and I have had it in my system while my GoldNote was out for warranty replacement, but really the phono stage needs to be matched to the cart not the amp.