I favor the rosewood/spruce combo (think Martin D28) over the mahogany/spruce combo (Martin D18). Depending on your budget, one of my favorite all-around dreads is the Santa Cruz D/PW. There is one for sale on the AGF forum. At a lower price point, I like the Larrivee D03R and the Epiphone Masterbilt AJ-500R or DR-500R. I hear the Eastman E20D is nice but I haven't tried one (there's one of those on the AGF forum for sale as well).