I recently purchased a pair of Lowa Civetta GTX Extreme boots (not much choice in the matter, as my feet are size 15), but I was wondering how the stock Gore-Tex/Thinsulate inner boot compared to an aftermarket liner like the intuitions? I have a very straight foot, and I noticed some pressure between my big toes and the inner side of the toe box - not much, but I'm guessing that any at all is a problem? My feet fit no prob in the shells, so maybe it would be more comfortable with custom liners? Any opinions appreciated.