Take a look at Six Moon Designs Traveler.
It's a panel loader, in case that makes a difference, but it has:
- pocket in the top (where the lid would be in a top-loader)
- mesh front and side pockets
- enclosed pad pocket - NOT mesh
- weighs ~28 oz with the aluminum stay (optional)
I carried one on my Long Trail thru-hike and it performed well. The most I carried was about 35 lbs and it handled it ok but I wouldn't make a habit of it.