Best External Hard Drive Dj

Some friends and I are starting a party planning business and I'll DJ I need help?
I am a custom to mix at the radio station online I ran through Sat Broadcaster 4. There is a big difference when you have to do this for a party. This I need to know is what equipment do I need and I mean everything because I have no equipment on stage please be detailed. I also have a large amount of music on multiple external hard drives that I run from my computer. I want to continue to integrate music I have on my PC when DJing. What is the best software and hardware to use when combining all in one.
Here is a great, powerful, easy to set-up/tear low speed. For the crowds as large as 400ppl MIXER: SPEAKERS http://www.guitarcenter.com/Behringer-Xenyx-502-Mixer-103846200-i1153498.gc: This http://www.guitarcenter.com/JBL-PRX535-3 -Way-15 – Speaker-Pair-Powered-600422-i1320172.gc combo sounds good. Just plug in your laptop, power, XLR and your group. Sound clarity is excellent and the bass / low range response is impressive. If you want more bass, you can add this sub: http://www.guitarcenter.com/JBL-PRX518S-18–Self-Powered-Subwoofer-System-104160122-i1172624.gc These are all self powered speakers and you can operate the system in stereo or mono.









