I love the background/set they have there! 2nd, 3rd and 5th are my favorites for composition.
I shoot lots of local church coffee house concerts with 7D's, similar lighting. Look through my Flickr pages. I have found if I am shooting wide open, that i rarely have near enough depth of field to capture the faces in the narrow plane it provides. Singers like this are constantly moving! Even with my 24mm/2.8, it isn't enough. I usually shoot ISO 3200, sometimes 6400 with the 7D's and get decent results. i also am shooting in Raw and use Lightroom to edit and output the JPEG's. Bump up the ISO, to get f/4 and shoot every opportunity you can. Looks like a good place to go back to! There are some great images to be had there!