I have an Alvarez AC60SC which I really like. It's now called the AC460C:
Alvarez Guitars : Product Information
The piezo system is great. It also has a nice warm, loud acoustic sound. It can be found for $4-500 used. I previously had an RC20SC, which they no longer make. It is a crossover guitar with a narrow nut width and radiused fretboard. If you are only playing jazz or rock, not classical, it's fine--very fast neck, but too narrow for arpeggios.
Taylor makes a nice classical AE that's not too expensive--$900 or so--the NS24CE:
TAYLOR NS24-CE & BAG NS24CE - Elderly Instruments
It seems to have a slightly narrower nut width than traditional classicals and a slight radius. I wouldn't mind moving up to it someday...