A home audition is best. Ask the dealer to send out one of his techs to set it up for you. If you need it for a few days, you'll have to pay for the tech to come back, but the cost won't be that bad.
The advantage of letting someone else set it up is that you can concentrate on the performance, letting the other guy handle the technical details. We are all capable of doing it ourselves, but in this type of situation allow yourself the luxury of being able to focus on the sound quality and system synergy. It will be fun and rewarding. If you end up buying the amp, you'll probably be able to work out a deal. But the service will be worth every penny!
The advantage of letting someone else set it up is that you can concentrate on the performance, letting the other guy handle the technical details. We are all capable of doing it ourselves, but in this type of situation allow yourself the luxury of being able to focus on the sound quality and system synergy. It will be fun and rewarding. If you end up buying the amp, you'll probably be able to work out a deal. But the service will be worth every penny!