whats would be a good lens for taking photos of live bands , or what settings are the best to use?

i did my first gig on saturday took some ok pics and 1 or 2 good ones

i used my 50mm f1.8 and EF-S 18-55mm Lens

Thanks in advance

links to the photos i took

http://s273.photobucket.com/albums/j...mer/?start=all

http://s273.photobucket.com/albums/j...%20Experiment/

and my fave photo from that nite