Bob Taylor (at Garrison) says they are re-tooling for Dreadnught body styles now. They will cease production of the concert models. He also mentioned looking into more exotic woods later on.

I'm no expert, but I like spruce or cedar on top with a heavy turn towards spruce.

I like rosewood sides and backs for the most part. I do have several guitars with maple, walnut or koa sides and back. Different tones, naturally. I suggest listening to guitars you play and make a decision based on the sound quality alone. One man's trash ...

In a perfect world, the tone woods on all instruments would be "mature" at the time of construction. Aged woods are common ground for instruments and their makers. It is hard to "mature" a 50 year old piece of any tone wood any more than it is already IMHO. What I do think happens is the guitar settles to a players style(s) after it has been played consistently (as in hours per week, not once a year).

I'm sure there are different opinions out there in Mudcat land. I know some players who keep the tone they like with humidifiers and others who keep their guitar as dry as they can (dry will kill a guitar eventually but I played some incredible ones that "live" in the desert and have for over 20 years).