Also, and I'm not doing them down for a second, I'm genuinely impressed by them, but you SHOULD hear one first - the do have 'a sound' of their own. I moved from two Ashdown Mag cabinets (2x10 and 1x15) and using the same amp, I preferred the sound of that setup to a single compact. ENTIRELY unfair test, but just saying that there is a particular sound to the compact, like any speaker cab that you may or may not like.
Reading this back through, this seems such a daft thing to say but it's a decent wedge of cash, I'd get out and gig one first - in fact, Alex pretty much encourages this with the trial setup!