I would like to clarify that the MP3s are not for the house system.
What I'll be doing is ripping my entire collection to MP3 and burning
them to DVDs and then depending on the DJ gig, I'll copy the
appropriate DVDs to the hard drive on my laptop and DJ from there. I
have all the necessary sound equipment and won't be plugging in to
anything owned by the house except for the power outlet. :)

I will also be copying some of those same MP3s to my portable player
on occasion, thus the need for MP3 instead of OGG.