I'll put the sound of my big 'ol Deep-Bowl USA Balladeer up against any under-$1000 accoustic for unplugged tone and volume. Honestly, I've played Taylors, Guilds, Martins, imports, and a CA and the deep-bowl, roundback Balladeer is the LOUDEST acoustic you will find. Mine is certainly not "tinny", it's got a solid Spruce top and a 2-piece mahogany neck with a rosewood fretboard and the tone is fat and bassy. Hit a power chord and that guitar will rumble your belly for 10 or 15 seconds.
Ovations, in general, aren't as dull and muddy sounding as mass-market acoustics are. They're clearer, crisper, and brighter. In my book, that's a good thing.
Mine is 12 years old and has no laquer cracks, warping, seperating top or anything else wrong with it. It rarely needs tuning. Honestly, I refuse to buy any acoustic other than an Ovation (preferably a deep-bowl). I'd like to own an old ebony-board Legend, because they've got a little extra clarity and sparkle that the rosewood ones lack.
The Composite Accoustic (CA) guitars are quite nice and comparable with Rainsong. They loud and clear sounding, are very well built, play great, and sound better than most wooden accoustics.