Topeak Road Morph G for sure, although I'm not sure about the accuracy of the gauge, it's close enough. The fact that you put one end against the ground, like a floor pump, gives you so much more power. Before I had a Road Morph G I never used to felt good about riding on a field repaired flat until I got home and topped it off with a floor pump.

Well, the gauge on my floor pump quit working, so now I use the Road Morph for every tire inflation, at home or on the road! It takes a few more strokes, but that doesn't bother me. I get my tires inflated as hard as I want wherever I am, whenever I want, priceless!