I have both an ES-equipped Taylor 414ce and Fishmans: Prefix blend in an 814ce, Rare Earth Blend in my Martin M-36, and Matrix undersaddle trasducer in a Larrivee Parlor guitar. Each has its own strengths and weaknesses, but I find myself turning most often in performance and recording situations to my 414ce. (It's the all-gloss rosewood LE, not the std. ovangkol gloss-top version). It has plenty of rosewood bottom end, plays smoothly (perhaps fits more naturally in my hand), and the ES sounds terrific and natural through a PA or DI into a studio console. (Not that terrific through acoustic guitar amps, which are designed for high-impedance undersaddle transducers--you get a more magnetic sound from it, with less sparkle and shorter decay). The Fishman Rare Earth blend is also magnetic, but you can dial the condensor mike into it. Of course, my favorite setup is an unamp'ed D-18GE into a Shure SM57, but I don't always have the luxury of a second mic stand or even input if not using my own PA. I am not a big fan of piezo "quack," which, sadly, most young acoustic guitarists who come to the instrument from rock think is the way an amplified acoustic guitar is supposed to sound. The only reason I have a piezo undersaddle in my Parlour (and my dulcimers) is that for the former, I wanted something quick and easy should I find myself in a performance situation while on vacation; for the latter, it's more natural than a soundboard transducer and easier to install on a dulcimer.