I will just echo what everyone has said, learning how to do flash photography opens up a world of opportunity and it would certainly be useful for what you're doing. I'd also get a wider lens, but go with the cheaper Tamron/Tokina/Sigma alternative, buy a new camera, flash and a good tripod. Sell the lens you have now. Or, go with a 5D and flash.
BrianO wrote:
Before you think about getting a newer and more expensive camera, learn first how to get the best exposures you can get (the balance of ISO, aperture, and shutter speed) and how to create the best best lighting (by using availalbe light and by adding your own).
