Saw both of these cabs today and they are in great shape. The Impress is the best of the two though. I don't think Ive ever seen a cleaner Impress, it looked brand new. For those worrying about the back panel it is a small piece and there are folks out there who can fabricate one for you.
The Naomi Uni monitor is super crisp and the cabinet is already wired up for 12 buttons. All you need to do is get a control panel, some buttons, and connect to the existing US Molex connectors.