Who better to ask than the mechanics? Can you recommend a durable floor pump? I am particularly considering Lezyne and Silca because they appear to be well built (lots of metal), designed well, and rebuildable. I like blackburns lifetime warranty too but I know I will probably have to deal with issues with this cheaper made pump which may be a hassle.
If you are not familiar with the lezynes check them out:
I am thinking that the classic or alloy model may be good. Seems to be built like a Silca but at a lower price and with the easier to use flip-thread chuck. But I don't know if every part (i.e gauge) is replaceable in the long run.