Hi Ken,
Since there are so many independent music stores all over your area, definitely hand them out your brochures so they can give to their customers, and you can return the favor for them. It'll be great to "cross pollinate" as the gear and the music go together like hand and glove.
Even target that huge independent book store in town - people there would probably love to get more out of their music than their stock iPod earbuds, and if they know your store is close by, I'm sure they'll check it out and get to listen for themselves and hear what they are missing.
The comfy chairs is a great idea, along with a small end table for some drinks. You probably can't serve alcohol without a license, but there are alternatives
Even let all the local coffee shops, small restaurants, art shops, etc. in town know about you, and you can give out information in your store about them as well. If you get involved with a lot of small businesses in your area, you can all help each other out and build a strong community. A polar opposite of the "big box" stores - that's for sure!
You are going to do very well - you are "chill" (laid back) guy who is not pushy or snobby like you find in some hifi shops. You know your products (you build a lot of it yourself!) and you like to help people and love what you do - there is no way you are not going to do great once the Portland and neighboring cities/towns finds out about you!
Man if I lived in Portland, I've move Red Wine Audio next door! Alas, my family and my wife's family are all here in New England and we don't want to be far away. Maybe I can get them all to move to Portland!
Wishing you all the best,
Vinnie