In reply to a crap climber:
I'm in exactly the same boat as the OP, in that I'm looking for a boot specifically for climbing routes in the Chamonix area during winter and shoulder seasons, including the swiss route. I ended up picking up the atomic backlands, which I haven't tested extensively yet, so I can't comment on that decision, but along the way I also tried on various other boots and wanted to chime in to correct some apparent misconceptions regarding the fit of the dynafit TLT series, to provide some potentially useful information regarding boot insulation, and share my experiences with trying to fit the procline.
The TLT 5 is very low volume, it causes quite a bit of pain for me for instance, and I think this is where the reputation of this line of boots comes from. The TLT 6 fits me more or less well, although it's a bit less comfortable than the backland on my foot, but is clearly more spacious than the TLT 5 of the same size. The TLT 7 is much larger volume than either, too large for me in fact. I get lots of slop, even with a thicker after market liner. Another point of comparison for these boots would be the procline, which I really wanted, but didn't fit my foot. It was somewhere between the TLT 5 and TLT 6.
One thing to be aware of regarding the procline is that your boot fitter may not be able to modify it too much given all the special features built into it like the rubber toe piece and the gaiter. My boot fitter is very well regarded in the area (front range of Colorado), and is likely one of the most experienced boot fitters in the state, but he was unwilling to punch the proclines due to these extra features.
The insulation on many of these boots is pretty skimpy, so I upgraded to an intuition pro tour liner. We'll see how well this worked, but it may be helpful to know that what fit for me was a liner that was 1 size smaller than the shell, in a medium volume (in other words my shell was 27.5, and my liner was 26, MV). Intuition makes liners in low, medium and high volume. I tried all three in both the shell size and in one size smaller than the shell size, and the one size smaller medium volume pro tour is what ended up working for me with atomic backland carbons. I shell fit my boots with two fingers between the shell and back of the boot, which I believe is the standard for touring boots, so if you shell fit your touring boots normally, try intuition pro tours one size smaller in medium volume for a liner solution that will be considerably thicker than a stock touring boot liner. I had TLT 6s on hand concurrently and believe a similar scheme (size down, medium volume) would work with this boot.
Post edited at 01:49