If you are really interested in the turning part, you might want to give your downhill boots a shot. I realize that this doesn't seem to work out for 95% of the touring population, but I've toured in my downhill race boots now for about 10 years, and I've never had a single blister. I think the key for me has been a super tight heel pocket so that you can tour with your buckles pretty much fully undone for flexibility without getting any heel/ankle friction. Last May four other friends and I did a 2 week traverse in the Coast Icefields, and I had zero problems with my boots. They all had downhill boots as well, and they only had minor problems.
The two things that do suck are putting them on in the morning when they are frozen, and touring flats (frozen lakes, glaciers) because the forward flex locks you in a knee-bent position.
I did at one point buy a pair of Nordica TR9's, which I sold because they had too much volume so I got blisters and the downhill performance sucked by comparison.
Thought I'd express an opinion I hadn't heard here yet. Race boots forever!