I usually have some short trip. So i do not need to carry a lot of things. I think the backpack like this will fit me.

A riding mate was having all kinds of problems with his soft luggage on hard off-road rides. Straps, rivets, stitching at the stress points kept breaking/ripping out. Soft luggage may be best if most riding is on smooth roads - not so great in really rugged conditions.

Just an observation.

I have these and like them

Aerostich Tank Panniers :: Tank Bags :: Packing It In :: Aerostich/RiderWearHouse Motorcycle Jackets, Suits, Clothing, & Gear

As far as Aluminum, Plastic, or soft rear panniers. I think the Plastic, (Pelican etc) is a great compromise between soft and Aluminum. Super tough and while not easily reapairable, I have dumped my bike with them on several times and had no failures. They do a great job at keeping the dust out of my stuff as well.

Pacsafe
 

Hi Dave, Yes that's it.
I use a canoe bag, with padlock on the zip, with a rucksack cover.
Then the Pacsafe over the top of the lot. Which locks it to the bike.
For my helmet I use the Lid Pacsafe, which is w/proof.
I found a couple of gas mask bags at a Army surplus store.
I strap them to the MM boxes and they hold all my cooking gear and a couple of water bottles.
(If in doubt, brew up.
If all is well,
spread confusion, create doubt.
Then brew up) :)

So I no longer need tank saddlebags.
Hope that helps.