+1 on the Road Morph, especially with the inline gauge. I've used Zefals, Silcas, and many others, but after getting the Road Morph, it's become by far the favorite on-bike pump.

Barrel diameter can greatly affect application and usability. A larger-diameter "high-volume" pump can fill a tube/tire fast, but require superhuman strength to go above 50 psi / 3.5 atm. Smaller-diameter pumps are easier, but as noted above can take eleventyzillion strokes to get to rated pressure. If you can, try before you buy. Or just get a Road Morph.