well, if the martin sounds good, you can just get that.
you might want to try 1-series martins too then, i actually prefer them over the performing artists one; they just sound alot better to me as they tend to be brighter and clearer(i owned one.) try one and you'll see what i mean, if you don't mind the simple aesthetics, you may like what you see/hear
an om1gt with cutaway and electronics, solid top, back and sides with laminated neck(which is good as its stronger and more stable than mahogany.) would for a little over one thousand new. also made in USA, which is a big plus. this guitar would be the size you're looking for
the fingerboard and bridge is rosewood, unlike the gcpa, which is plastic.