If you go the handpump route I highly endorse the Hill handpump! Made in England.....built like a tank......has a dessicant pack or unit attached to assist with moisture but we all know moisture still will develop. They are totally rebuildable and you can get those parts very easily from the likes of PA and other retailers.A Hill will run you around last check $290 but worth every penny.
i'm thinking about getting a rifle and the PCPs look nice, but it seems there is a expensive bit of equipment needed to support it. I don't scuba dive so i don't have that kind of equipment around. I saw there are hand pumps, but I imagine they can't be that efficient to be able to deliver 2000+ psi. How about small (12v?) compressors that can be used in the field (car power)? i don't like break barrels (reputability issues) so that leave side/under cocking rifles. those have recoil, but i noticed the airking 54 recoil-less. nice, but kind of heavy. i plan to do some bench shooting and occasional varmit hunting, so not sure which way to go.
I usually run my Marauder from 2800 down to 2200. Takes 50 strokes on the Hill pump to top back up. I don't find it that tough - just take my time, pause at both ends of the stroke for a second and use my weight on the downstroke.