Godin's
 :bump: 
You want to look for a guitar that has a soild top! Helps with holding the tone.
http://www.seagullguitars.com/productlisting.htm
Are great guitars for the price.  (All solded tops)
($400-$600)
I have own Seagull M6 & M12 (they sound great - have a bright tone (Mahogany & Spruce combination on both). 
($300-$500)
 I have also owned the "S" Series (S6, S6CTQII) - great bang for your buck.  These guitars had a deeper tone (All Cedar).
If you have a little more in your budget I would try one of these!
http://www.larrivee.com/flash/products/products.html
Larrivee's are great higher end (affordable) guitar IMO
Check out the L03 & D05 (you can get them starting around $790 & up)
I'm planing on getting the D03RE in Dec.
hope this helps