Yep, ideally, I think it's a try before you buy guitar (mind you, they ALL are to me! :lol:).
I've just realised, I've got recordings online where you can hear various things my 5th Avenue has done. I've just listened to them to pick out the ones that I think illustrate what it could do. This has done a couple of things for me - it's reminded me that I LOVE this guitar (I must go and restring it immediately and make some music :lol:), and it sounds to me like sticking a P90 on this guitar and playing it through the right sort of amp could indeed give piano tones (and it's got bog-standard medium round-wounds on it).
Anyway, these are the examples where the 5th Avenue was used exclusively. Usually recorded with a large condensor, most without a plectrum. The 5th Avenue also appears on some of the other tracks (follow the link in my sig for the whole lot), but is buried amongst other instruments - eg on "A Hundred and Twenty Pound" it is the only acoustic, but I should have used the flat-top instead, I couldn't use the acoustic track as much as I'd originally intended, and I realise now that's what's "wrong" with it :lol:.
http://alonetone.com/andyr/tracks/now-that-youre-sleeping - this one is just the 5th Avenue and vocals. You need to be aware that there are voices doing a bass part from around the second verse or so - otherwise all the instrumentation is 5th Ave. There's, er, quite a few of them in places! This one, on its own, probably illustrates most of the range of tones I can get out of it.
http://alonetone.com/andyr/tracks/sleep-instead-of-teardrops-cover - 5th Ave, bass and a single vocal. Some of the guitar overdubs are the closest I get to jazz at the moment.
http://alonetone.com/andyr/tracks/sleeping-with-the-ghost - this is 5th Ave, bass, and a lot of vox. The first serious use I made of the guitar, I'd had it a week or so by then. I bought it for playing stuff like this.
http://alonetone.com/andyr/tracks/the-knife - again, 5th Ave, bass, and a single vocal. Sounds to me like there could be a very thin plectrum being used on the strummed rhythm parts, the rest is fingers.
http://alonetone.com/andyr/tracks/oh-darling-cover - I include this one because it's the only one without overdubs. It was recorded "live" with just one mic to capture both the guitar and vocal. It sounds like I had my usual "electric" pick in my had - 80mm Nylon. To me it illustrates how it can do the job of a flat-top for me, but still has this quality in the low notes that I can't get from the flat-top (and the mic on this was placed to capture optimium vocal rather than guitar).