Another +1 for the Road Morph.
If you want to allow carrying it on the bike, given that on the road is where it's most likely to be needed, the
Topeak Peak DX bracket fits it, and leaves the bottle cage mounts usable for a bottle.
In terms of pumps, the basic rule is that the bigger they are, the better they work.
This is why everybody sensible has a full size track pump at home, and is why the size 4 Zefal HPX under the top tube of my touring bike works better than the size 2 HPX down the seatstay of my audax bike. Unfortunately, many modern bikes don't allow for the fitting of a frame fit pump, what with sloping top tubes and rounded joints on carbon or hydroformed aluminium frames.
The Road Morph is similar to the HPX2 in terms of function, gaining on track-pumpness what it loses on size