I wear a Size 13 boot. Had the the flow5. Had a hard time getting the hiback to lock close because of the boot size. I have also use the volkl fasttec which solved that problem but still was a little tough to get the boot in. Would the nx2 have more room?
Only reason I am looking for this type of binding is because I snowkite.
I also have a set of last year's GNU Agro's for my K2 T1 DB 11's. The Larges were too small. So I had to buy an XL and adjust all the way down to get a good fit. Really nice bindings. A bit easier to get into than the old Flows. On my backup board.