The Airsteam Forums offer all the assistance you will need in selecting and evaluating an appropriate unit, at least they did for me. This knowledge base is invaluable in the search and resolution process.
Elaborate on your concerns/questions and watch the responses rush in.
Welcome to the club, and happy hunting!
Unfortunately, once you have been infected, there is no cure.
'00 Safari 27' Rear Twin
'03 Ford F-250 7.3TD/CC/LB 4x2 Bio-Diesel
"Hmmm... Smells like French Fries!"
/ WBCCI FCU 8579