I am still pretty new to photography, and also in the process of learning along the way as well.
I am currently using a 7D to take stage photography and things didn't come out so well since I lack range, or I just lack the larger aperture lenses.
And for indoor as well; most of the time I need to use a flash to compensate to get a better shot.
I only have a 50mm f1.8, 17-50mm f2.8 and a 70-300 f4-5.6 in my arsenal.
I look forward to any suggestive and constructive comments =)