I used DJ Mannia for my wedding a few weeks ago and they were awesome!  We had them DJ our reception which was 4 hours (we extended the traditional 3 hour time to 4 hours).  I gave them my iPod which I had broken out by song type (dinner, dancing, slow dancing, first dance, etc.) and they did an amazing job of mixing up my songs.  My guests couldn't stop dancing... in fact I think we danced 3.5 hours out of the 4 hours of the reception!  Thanks again for making my wedding day wonderful :)