Well, this is exciting. I am hoping to be able to do something similar within a year from now myself (looking to move to a new house soon). Being prepared for 9.1.6 (at least wiring for it) is smart IMO. Personally I would wire for 11.1.8 (assuming new construction of course, which is not what you're doing). Who knows if I would ever go there (probably not), but wire is cheap.