i think i'm in the market for a new carry-all. i have a lowepro-like topzoom which carries my camera w/ 17-40, battery charger, extra memory cards, and that's about it. i also have a lowe-pro slingshot 200AW, but was thinking of getting a backpack this time around.
it needs to carry an XT w/ battery grip, at least 3 lenses (prime, wide angle, tele), two flashes w/ receivers, filters, batteries/charger, memory cards, and a space for a sandwich would be nice too

tripod attachment would be even better.
what are you guys using to lug around your gear?