I just used a stirrup pump for all my pcp's, and never had any problems with it, i read negative comments with the s410 you only get 60 shots before a recharges is needed, if your out shooting game or vermin and get 60 shots then you would be very happy, you wouldnt be moaning about missing out on other shooting.
Stirrup pumps can also be picked up very cheaply secondhand on airgunbbs, so realistically there is no "other gear" than a stirrup pump, if you choose to go down the divers bottle way, then yes that could get expensive but why bother, couple of minutes of pumping and the guns charged!!