Here is the rear view of the bags on the bike. This is the setup I used through Mexico and Guatemala this winter. Lots of room, water tite, secure, and quite ugly to match the KLR.
You don't have to worry about trashing a $1000 set of boxes if you fall over. I didn't crash test them yet, so I don't know how well they hold up to abuse, but for the money, who cares?