I think that the amount of internet savings plays a big role in making your decision who to purchase from. If the brick & mortar store is a considerable amount more, then this should ease your conscience about buying online. Tell them the online price and ask for their best price, followed by "is that the best you can do?"
Tell them that you like to support retailers, but at the same time you aren't made of money and the internet helps you afford these expensive toys. If he wants the sale, he will work it out with you. If he isn't willing, do what's right for you.
If these retailers get put out of business by the internet, there won't be anyplace to actually hear these devices. We'll be buying on reviews, word of mouth, and not with our ears. Give him every opportunity to work out a mid-ground that is fair for both of you.
Tell them that you like to support retailers, but at the same time you aren't made of money and the internet helps you afford these expensive toys. If he wants the sale, he will work it out with you. If he isn't willing, do what's right for you.
If these retailers get put out of business by the internet, there won't be anyplace to actually hear these devices. We'll be buying on reviews, word of mouth, and not with our ears. Give him every opportunity to work out a mid-ground that is fair for both of you.