Reply to Upgrading from MP3!

Hey all! I have decided to stop buying MP3's and go strictly lossless in my music files.

My question for you all is should I go WAV or AIFF? I know WAV is the standard in like 9/10 applications, but DJ'ing on a Mac I've heard that AIFF is better. I buy from mainly BeatPort and Traxsource both of which sell WAV's, but only BeatPort sells AIFF's which makes me lean toward WAV's again.

Also, when you upgrade your BeatPort buys you can only get AIFF's. If I decided to go with WAV's, what is a good free/cheap batch file converter for AIFF-->WAV for Macs? And if I chose to go AIFF will the same application do WAV-->AIFF?

Thanks in advance!!!