With the acquisition of a D90 and the addition of another lens, I've reached the absolute limit of what my little Tamrac Velocity 7x can handle. I'd like to get a backpack-style bag with the following criteria: - Needs to carry D90 + 80-200mm f/2.8D, 50mm f/1.8D, and a 17-50mm-ish f/2.8 - Space for two small flash units, 3 or 4 filters, a charger, and spare batteries - MacBook Pro 15" and its charger - Offers quick access to camera - Weather resistant or at least comes with a cover - Has straps or some mechanism to attach a tripod for carrying - Isn't ridiculously expensive The LowePro Fastpack 250 meets my storage, quick-access, and inexpensive requirements, but it doesn't have any tripod attachment mechanism nor is it the slightest bit weather-proofed. I'm not going to submerge the thing, but I'd like to not worry about it in rain and carrying it on the beach. I plan on doing light hiking and would like to take this with me as my carry-on when I fly. I've also looked at the Kata R-103 which is getting to the high end of my price range, and I also just don't care much for the configuration. Any other suggestions?