I still like using my laptop for live gigs, but I also make higher quality mp3's, through adobe audition 3, and save them on my iPhone. There is a great app called "Backtrax" that allows you to play tunes one at at time and edit the order of your set list. It also has a show lyrics function, but that doesn't seem to work on my 4g phone (I probably need the new iPhone). I'm using a Bose L1 compact PA and the sound is great. I'm thinking of getting another one just for the stereo effect (for me, not the audience). I have two L1 mdl II systems at school that fill a very large auditorium with an amazing stereo sound, even using mp3's.