Hanson Audio - I think they're in the Northeast. (I'm too lazy to backtrack this morning.)
Bought a Primare phono preamp from them for a little below their asking price a while back. They countered, accepted, shipped quickly, followed up, all the things retailers ought to be doing. Very nice people.
Reno Hifi. Can't say enough about Mark. Sets the bar very high. Answers emails quickly, picks up the phone himself. Three purchases in about two years. He's my go-to for Pass Labs, period.
AudioClassics NY. TONS o' McIntosh gear and other manufacturers. Pair of Usher floorstanders a while back. Repacked with enough protection to withstand a MOAB. Quick on the phone, quick with emails.
Saturday Audio Chicago. Got my pair of Thiel CS 3.6 from them about 2 weeks ago. They're great on the phone, not so much with email. Speakers were repacked with so much protection I almost needed a dumpster. Flawless and as described/photographed in the ad. Phone better - super helpful and knowledgeable all the way.