Endorsed, Tangledwood - the older she gets (nearly 3 years, now), the richer the tone.

I tried a Martin D15 in the same shop, same time, and wasn't impressed.

Richard B has the rights of it - Martins, in the UK, are (generally speaking) out of the price range of the average singer of folk songs.

Name Drop alert ! :-)

I have in the past played Martin Carthy's Martin, and Ralph McTell's. Both times I "met myself coming back" (this is the only way I can express it). A friend at the time, Rosemary Hardman, commented :

"First you learn to play guitar ; then, you learn to play a Martin".