I bought myself a Martin 000-15S last year. This is an all mahogony guitar modeled like an older Martin with the neck meeting the body at the 12th fret and a slotted head. The "15" means it is the simplest model--not much of a rose or binding.I find it is very resonant and it is playing in beautifully. I got rid of the guitar I had before (a Maton with the highest class Sitka Spruce top) and use it as my only guitar. I shall not want another. My only (very minor) complaint is that it has a "D" type pickguard which doesn't go with the mahagony coloring. An all black one or none at all would have been better.
There is of course one advantage to a mahogony top. It is strong. It is less likely to crack and to get dented than spruce of cedar. (That sound is me knocking on wood.)
Murray