Ron, based on your foot size and shape and I have to disagree with Gary. I have similar (maybe slightly thinner feet) and the only boots that will ever give me a tight enough fit are plugs or semi plugs. The idea that you can't ski the whole mountain in plugs is not based in reality. First in the Head boots you can reduce flex substantially by taking out the two screws in the cuff and this softens them to a 110 ish flex. Second in moguls with a booster strap, you can unbuckle the skis some and you still have the lateral stiffness of a race boot, but as much forgiveness that you would get from any "all Mountain" boot. Hovever, this all mounatin approach will be with a boot that actually fits you instead of one that doesn't (and can't) because of the size of your foot!!
Lastly, I unbuckle after every run and I have been doing this for years and well before I got my plug boots. I find this gives me the best responsiveness when I am skiing and allows my feet to relax some on the lifts. You can dial in any boot so that you don't have to loosen the buckles each run, but you are definitely giving something up in performance and response when you do this. This is? personal preference call.
Obviously just my $.02 among friends. JB.