Just rode the new Storm 400 miles from Phoenix, AZ to L.A., and man are my shoulders killing me. (Bah Boom.) Don't get me wrong, the bike is an all-around well-engineered package in any kind of riding situation: super-smooth fueling, eager throttle, power whenever you need it (just ask) and well-matched gearing. The thing kicks ass. But it's a bear if you're trolling the superslab, mostly because it sets you out like a sail in the wind. A couple of hours at 75mph+, and well...you'll be digging for the ibuprofen. Which stands to reason - I mean, it's not designed to be a touring rig.
I'd assume existing Thunderbird accessories could be easily fitted to this model though, in which case i'd go for the midsize screen - something that won't muck up the low, clean lines of this bad boy.