I've had my 40D and 70-200 f/4 L IS for quite some time now, and I'm ready to make my next big photography purchase. However, I'm not sure which equipment to get first. Using the 70-200 on a 1.6 sensor can be difficult indoors because you often have to move far away from your subject, but also b/c of poor lighting. I'm thinking of either getting a 35mm f/1.4L to handle low-light situations, or an off-camera lighting set, complete with 580EXII, tripod, umbrella, and the new pocket wizards. Do you think it's better to build your lenses or other accessory equipment? Also, I have yet to invest in a tripod, but wouldn't an off-camera lighting set pretty much allow you to shoot without one? Thanks for your help.