Topeak Road Morph. Take the word from someone who has bought 4 different mini-pumps...
I've bought the:
1. Mammoth Mini-Pump
2. Crank Bros Alloy
3. Mini-Foot Pump
4. Topeak Road Morph
I have a Road Bike and pump the tires up to 85+ psi. I also have a folder that I pump up to 50 psi. Pumping with #1 and #2 are a pain. I broke a stem with #2. #3 the mechanism is cheap and too easy to break. Then I got #4. It was an expensive lesson.