Been a while since I posted on this subject, but I have my guitar back in hand and, WOW!, what a sound! Taylor installed the ES2 system and if you didn't know, you couldn't detect that any work was ever done on the guitar. They removed the mars in the top of the guitar and it looks wonderful, like new.
When I received it, I immediately took it out, examined it, and plugged it in! The tone is even more awesome than what you would expect from an 814 CE. I played until my fingers hurt which doesn't happen often. I love it so much, I've begun searching various finger picking techniques and found you can teach an old dog new tricks.
In my estimation, the upgrade was well worth it in quality of sound and much longer battery life and "the AA battery rattle is gone forever!!!