I have had the medium flex in that year's boot on my foot, and I could barely flex it, even at 200 pounds. I shudder to think what the hard flex would feel like. Find a good bootfitter man, you will need work.
I have been skiing the X2 for the past 5 years- had very little work done to them by Surefoot here in Vail- just some grinding. I am 148 lbs and can flex them fine- I even added the front spoiler to firm them up more. Thye have more movement than I was able to get from the Lange, Atomic and Nordica plugs. The only boot close was the Rossi from last year.
At 200 lbs you should have been able to get lots of flex out of them.