+1. Jazzes can do anything.
They can't do what my Carvin does. In fact, the Stingray can't either, tho it's a lot closer to the Carvin than the J is.
So depending on the type of sound he needs, I don't think the OP is nuts at all.
I.e. I like a clean, sits-in-the-mix "paw paw paw" sound and with as little hammering with the right hand as possible. The Carvin is the only bass I've ever played that does this right out of the box with no EQ and no matter what strings I put on it.
If you're into the "flub flub clack flub" cardboardy sound, the Precision is the way to go. If you want "plink plink plink plack plack plack" the Jazz will do that pretty good.
The Stingray is kind of in between the flub flub flub and clop clop clop sound, tho if you do away with the frets, that calms it down quite a bit. But it's still a pretty honky sound....
So I also really tried to love the Stingray/Sterling but just couldn't make myself do it. When I discovered the Carvin, it was like coming home or something (and you can get the other sounds out of the Carvin too with the pickup pan pot if you need them).
But again it'll depend on the type of sound you want and how strong your right arm is....
LS