Giles, got my jeans today and they are a perfect fit.  Your excellent measuring instructions were super handy.  I measured various pants in my wardrobe that fit well and not so well and determined the best model from your choices.

Regarding my fit, I have extremely muscular thighs and calves.  I originally used this link to help me identify the IH634S as a good option for me.  http://goonlifter.wikispaces.com/Fitting+into+jeans

FYI, my waist to thigh is a ridiculous 1.87  :-\

Even so, the 634 is the best fit I have ever found in a pair of jeans and I have had trouble in this area as you can imagine.  I also received them within just a few days, which was great.  Thanks a lot and merry Christmas.