I've got an old Mountain Morph with no gauge. It was designed for mountain bike tires, but I've used it mostly on one of my road bikes. This is a good on-bike pump.

I've got the Road Morph G as well. It's on my weekend/long-ride road bike. This is a really nice on-bike pump IMO. The gauge is a little small, but it works OK, It seems to increase in increments, and that takes a little getting used to. I've used it a few times for flats on my own bike and a number of times during our group rides. People are impressed with the little pump with a hose, foot peg, and gauge.

The hose and foot peg make inflation of tires a lot easier than otherwise.

If you're riding the roads, I would recommend the Road Morph G.