The Beet Fleet concert in Split

I was at concert of my favorite group in Split and I make some pictures. I would like to hear coments and some advise about taking pictures in concerts, as I don't do that so often (1-2 times per year).. More pictures you can find on my web gallery at http://www.karadza.org …a/thumbnails.ph​p?album=11

The first one is a little soft and crocked ... it is nice to have horizontals be level. #2, #3 and #4 are interesting enough that they don't need to be technically perfect. Again, the last one is a little too soft. I know these are very difficult and there is not as much light as you would like.

Very Low light, very hard to use Auto or Manual focus, and I don't take pictures from concerts so often to know what to do.