I like the look of the St Vincent guitar, but a small/narrow neck is a non-starter for me.
I've been playing 7 string almost exclusively for a couple years now and I love it. It's kind of making me interested in an 8 string, which I had always dismissed as being gimmicky. And as much as I don't really dig the "signature" aspect of signature guitars, if I was going to put real money into an 8 string, I think it would be Fredrik Thordendal's hideous goofy-looking Ibanez: