the videos with the digitals come out totally amazing. You can set the film speed to 400 and speed it up for non-flash photos in P (Program) mode on Sony digitals, but you have to practice. I practice shooting a tv screen in the dark, which is sort of like a concert would show up. You can also manually set film speed, exposure, etc. in M (Manual) mode, but P works best because it does autofocus after you manually set the film speed and exposure. As far as I know, Sony's don't have a "sports mode," but the booklet tells you how to set for it, so buying a camera with a "sports mode" on it is a +, otherwise you can find in the booklet what settings to do in P or M, or whatever your camera has for setting your own manually.
If you do videos you need extra batteries, and lots of memory cards. Some of the digitals have unlimited video capability, limited only by your batteries and cards, like the Sony's.
It takes practice at concerts to get great photos. Taking a flash more than 15' away gets you only great closeups of people's arms right in front of you.