Both are roughly the same thickness even, so not even a nitro nut can tell you differently. The poly finish will not significantly effect the tone of the guitar. You should get something.anything at all really.

You don't even need a tube amp, although I highly recommend it. If you want good sound/tone/volume, you need to get some sort of amplifier.

Fingers, I don't want this to come across the wrong way, but why spend $1000 on a nice electric guitar and then not get any amp? Plugging your headphones in doesn't do anything, you can probably barely hear a signal coming out and it's mostly the acoustic sound anyways.