Disclaimer upfront: I have one for sale.
The Bel Canto PRe3 is a fantastic preamp. About as transparent as you'll find, a pleasure to use, balanced in and out. Meets all the criteria you stated and would be a good match for the Emotiva. Read the reviews.
The Bel Canto PRe3 is a fantastic preamp. About as transparent as you'll find, a pleasure to use, balanced in and out. Meets all the criteria you stated and would be a good match for the Emotiva. Read the reviews.