In our band, our lead singer/rhythm guitar uses an L.R. Baggs I-Beam in his acoustic and runs it into the Baggs Para Acoustic DI as a preamp/eq. It sounds pretty darn good, but I think the key is to pick a pickup that works with the type of guitar you have. The I-Beam has a very bassy output, and he plays through a 000 sized Martin knockoff, so it makes up for that guitar's relatively mild low end. That said, it would probably be too boomy on a J45 or Jumbo.