I'm mainly looking for comfort for longer, multi-mile hikes. Quick camera access is not as important to me. Must be able to easily carry a 21-24" tripod and 15" laptop.
Right now I use the Tamrac 5586 Expedition 6x but it leaves something to be desired. Not really sure what it is, but I think it stems from how "boxy" it feels on my back, and I want something slightly larger. Also it's only rated up to a 14" laptop, but I've honestly never tried my 15" to see if it will fit (Dell claims the XPS15 can fit into 13" bags due to small bezels. But again, never tried it.)
I was thinking about going with the Expedition 7x or 8x, but I feel there have to be better options out there for the price.