Turbofan, the only two dealers I use are the ones you mention.
I agree, the parts stock at BB is deep. I have walked the aisles there in amazement, and seen their new boats on display at boat shows. I imagine they are what Hobie wants in a dealership. When I call, the sales person generally knows his stuff.
I've talked to KH about business down there. Sounds tough, with very very few customers for new boats, especially fiberglass ones. Maybe there's untapped potential for rental sales, I don't know. When I call there, as when I call BB, I know what I know and I have no problem leading the conversation so maybe a difference in experience isn't as apparent to me. No matter who I call, I tend to know what I want and will describe it. I'll grant you, at BB I'm more likely to be able to ask, "What do you guys usually sell for XXXX?" and get a confident answer, but I have many times been happy that KH is there for me and I make sure to have an order with him every summer when I go down.
South of Whalebone Junction, the OBX is a wasteland where no one seems to want Hobies newer than about 1980. Everyone I know down there has a stash of ancient boats that they got for free and will keep mix-n-matching to stay on the water with. I wouldn't want that market.
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'00 H16 #104691
'78 H16 #32692 ex-rental [gone]
Old Holsclaw trailer
My Hobie 16 pages