While we're at it, anyone know how much difference the birch/cedar/spruce topsides make? And does mahogany vs. birch really make a difference for the back and sides?

Also on the subject, solid-wood instruments "mature" with age, don't they? Is there any "wearing-in" time associated with these? And would the plastic bracing affect that?

Lots of questions there! :-) Hope there's some luthier/experienced player who can supply a few answers, cos those look like some sweet guitars.

Grab.