I'd recommend athat you look at a cedar top if you like a mellow tone. I have a really nice Takamine cutaway acoustic electric with a cedar top and lacewood body. Played through an electric amp, it get a great jazz tone.
On the other hand, Gabor Szabo used to make great music on a Martin D-45:
http://www.youtube.com/watch?v=Xz0zYA_12og
Sorry about that previous link. I didn't know that was still on my clipboard.