When your sales territory and margins are protected, you don't need service to give you an edge.
I think you've just made a HUGE assumption there!
There is no discussion or talk of sales territories, and a protected market is not on the table at all. Companies like Paradigm, and B&W have always freely picked their specific vendors and those vendors are very much in protected localities, and without any MAP, those stores tend to run at or near full MSPR all the time.
The question is whether or not Panasonic or Sanyo, which is available online from dozens of etailers, from Best Buy, from your local 'boutique' dealer can ask for and enforce MAP. In which case there is no protected market and for the same $$$ you can choose to buy online or buy from the boutique, and may see the exact same price no matter which way you choose to go.
Which way then, would a consumer choose to go?
I think it is a very valid point to say that in this type of environment, the enforced MAP would not only favor, but cater to, those companies which are able to elevate their level of customer service to a higher level.
As a small custom dealer, I have zero ability to get Paradigm speakers or B&W speakers. They also, unlike many other companies, don't come up with online stores selling them the way other brands do so easily.
MAP? I'm not sure I disagree with it at all. But, it is ADVERTISED price, not selling price, so the store is still free to sell at whatever price they actually want to sell at.