I had the Gobis on my KTM and I've had the Pelican cases like the Caribou set up. The Gobi system is OK but, I felt they were too wide and bulky. The Caribou set up can hold more, the hinges are durable, they don't sweat inside because of the venting and are 100% water tight. I vote for the Pelican/Caribou option.
I wouldn't worry about the racks, mine don't have the center bar either. Run them and see what happens, I have 20,000 miles on my set up, no issues.