I think for me it would depend on who the artist is, and how similar they may be to me or what I'm trying to be, silly as that may sound. I owned a Dingwall NG-2 Nolly Getgood signature for a time but, given I play in progressive metal type bands...I dunno, it seems hard to not come across as a fan over a musician in your own right. "Look, there's a guy pretending to be Nolly..." That new Stingray is a beauty, and I would have no qualms owning such a bass.
I'd never, ever pay a premium for the pleasure/gimmicky features, whoever the artist is.