A dream dealer is an interesting question. Have you heard of a company called Best Buy?
Best Buy are the world's largest technology store, and they win over customers by having easy to navigate store, with clued-up employees who know what they're talking about and can help customers in a way they'll understand (and support them at home with the 'GeekSquad' - highly-trained "geeks" who can solve all your problems and gripes easily).
They started by trying to win on price, and that turned out to be a losing game. One of their new CEOs took a different take - win on service and location. Practically every city in the States has a Best Buy store with consistent, excellent service. Its an experience going there, really!
What's interesting, is Best Buy is trying to open up here in the UK, although they're well behind their current targets thanks to a lack of retail space here. I went into the Hedge End store before Christmas where it appears like they're just finding their feet.
Still, they are stocking some brands of electric bike...
I'm not suggesting Best Buy are the answer, but take what they're doing and create a shop with their guiding principles. Large, space to try stuff out and with an expert beside you if you want them. Retail done well.
Imagine having some of the design engineers in some of the stores a couple of days a week, seeing how customer react and work with the product. And why limit it just to the design team? MDs, managers, delivery folks...
And then scale it? A franchise-scheme perhaps?