I was looking at those and comparing them to the little AC-215. It looks like the AC-215 is just a mini version of the elite series... it has all the same features apparently.
Or.... am I missing something?
Give Furman a call and let them address those questions. While the designs may be simliar, the units get beefier as you move u the line. I am using the IT Ref. 20i and it made a huge improvement in my system.