Touratech here as well. Of all the racks these ones are the beefiest. I could not belief how well made they were until I got them. Double layered brackets and everything is stainless. You truly do get what you pay for.
SW Motech brackets allow the mounting of many different brands of hard cases and would work well for most soft cases too. I just bought Hepco Becker racks because I got a great deal on them. Edited to add: otherwise I would have bought SW Motech. They allow me to use their hard bags or I think they'll work for soft bags if I want. I don't think the Givi is quite as versatile.
I think you will be happy with those. I almost went with them but wanted a more robust and permanent mount for mine. I had to really be honest with myself and reached the conclusion that I do not have enough experience on this beast to consider hard panniers.