If you can't audition which I don't understand because Reno Hi-Fi offers a free 10 day in home trial, you just pay shipping to and fro if you send it back. And as far as cj goes I believe Spearit Sound will do the same if you ask. But if you don't want to go through all that and just want to make a purchase then Pass is your safest bet because of that system synergy thing going on. Companies simply design their amps to naturally go with their pre-amps; sometimes logic simply plays out.
Chuck
Chuck