A little update on the XV-910 and the XV-950: The 910 is definitely the better guitar, at least as received. I find the pickups on the 950 a little anemic-sounding: they're all right, but they don't have a lot of output, and I don't think that their character is all that inspiring. In terms of output, I can generate feedback with my Epi Valve Jr. cranked, but only on a couple of notes (C-sharp/D-flat and G-sharp/A-flat). The body must have a couple of resonant peaks at those notes. It may be that, as the finish ages further, the guitar will become more resonant and feed back more easily--but I think that I can generate feedback more easily with some hotter pickups. So I'm probably going to swap the Retrotrons out for some PAF-style humbuckers or a humbucker-sized P90. (Of course, I could go for a pedal--but why not have the sound I want straight out of the guitar?) The 910 is very playable (especially with D'Addario flatwound .11s and some setup tweaks), and the pickups have a nice presence to them.