If an amp is competently designed and has adequate power for the speaker you're going to drive in the space you're going to drive it, auditioning will show up only one thing: hum. And that will be applicable
only to the particular amp you use to audition; if you order a new one, the hum characteristics may be different (better or worse). So auditioning is really worthless in 99% of the cases.
In fact, auditioning can be a bad deal. Whether it's in a dealer's showroom or in your home, the levels need to be matched perfectly. Otherwise, you'll get the (erroneous) impression that one is "better" than the other, which won't be true.
I'm in the same position as you are. The last audio retailer left the area about 8 years ago, and when I buy new, it will perforce be with no audition. The thing is, I am not worried. If it measures OK, it
is OK.
Good luck on your choice. Personally, if I were to gamble,. I'd gamble on the Outlaw ....... but that's just me.
Jim