I tried the BMW tankbag at the dealer. I too liked the mounting system. Unfortunately I found it quite large and located too far back on the bike. It interfered with my 6' 4" 350 lb. gut when seated on the bike.
I'm going to see if I can come to a deal with KentuckyBob on his Touratech low bag.
Thanks for all the replies and advice. It's always appreciated.
Then, while at WFO on my way up a dune, I understood. It was like the heavens opened up and I heard the voices of Angels.
Shortly afterward, I heard the voice of God. He said, and I quote, "Dumbass."