To me, the advantage of using a laptop live with BIAB is that you can edit on the fly, especially when my horn player shows up and prefers different keys to play in. I change them on the spot and the number of choruses, if needed. And for vocals, with the scrolling lyrics, that eliminates a book, stand, light, etc... That's worth a lot. But I wonder, too, what happens if the computer crashes? I'm waiting for the solid state drives to come down in price so I can make it the primary laptop with the other as a backup. I've tried CDs and mp3s, but still prefer the laptop. By the way, my laptop has two audio outputs. Didn't realize that when I got it. I run both outputs through a mixer then into two sets of powered speakers. Talk about a big sound!