hi im considering buying a martin. im torn between a D 28 and a D16R. they both sound the same to me, the only differance that i see is the top bracing and the mortise tenon vs dovetail joint arguement. im not an expert so your info and expertise on this matter is greatly appreaceated, does the fact that the D 16R having a MT joint affect how the tone changes as it gets older. usually a D28 will get better with age but will the D19R do the same.