I'm also looking into the FFFC09M1RW. A friend has it and says it can comfortably hold 4 cornies without putting any on the hump. It looks like it could easily hold a couple of co2/nitro cylinders on the hump too.
It looks like these solutions still require you to take your keg out and weigh it each time you want an update. Has anyone found a solution for taking constant readings?