Audio Research Ref 6 upgrade to 6SE.

Well today I dropped off my Audio Research Ref 6 at my Audio Research dealer. Audio Research told me as of right now the time span when they receive my Ref 6 is a week turnaround to upgrade it to the Ref 6SE. Which is extremely fast. I can’t wait to hook up my new Ref 6SE to my new REF 750s. Has anyone had the upgrade from the 6 to the 6SE ? If so what were your impressions ?