When I get a touring bike, I am going to try some panniers. I just didn't want to put any panniers on my sport/racing bikes. Just like with my motorcycles. They are sport/race machines, they couldn't pay me to put any bags on them, but people do.

IMO, on a touring bike, panniers are at home.

On my backpack, this one seems to be a quality one. I can carry more gear in it, but yet if feels lighter and more comfortable.. Quality!!