I have no experience with Shindo and just recently heard an Atmasphere and thought very highly of it. My all time favorite pre is the SMC VRE1-b but it's just not in reach at this time. I no nothing about the Atmasphere phono in their pre (They do not make a stand alone phono unit) but I have heard Ralph the owner of Atmasphere is a big time analog fan so I'd assume it would very good.
You are right about Atmasphere is updating their gear all the time and offer those updates at very reasonable rates, that's why I'm leaning towards their gear.
You are right about Atmasphere is updating their gear all the time and offer those updates at very reasonable rates, that's why I'm leaning towards their gear.