If I were in the market for a pump, it would be the Road Morph, no question.
However, I already own a Cyclaire Plus, which is about the same weight, and is even easier to get high pressures out of, so I have no pressing desire to change. Especially as it, plus puncture tools and a CO2 cartridge all fit in one of the side pockets of my Carradice rack bag where I rarely have to think about them.
CO2 wins on compactness, if you can walk or get a taxi for the n+1th deflation.
Mini pumps are, in my limited experience of the genre, rubbish. Assuming the good ones don't fall to bits, your arm will instead.