wdp bassetts pole would be your best bet. possibly urban paintball aswell.
there is a thread for urban paintball up at the moment in recball (i think). most sites unless running walkon days would prefer you to use their markers or non electro gats such as tippmanns. with an ion in yer collection it might be a bit quick for some sites to allow used. also tryin to find a site which uses Air rather than co2 to power the ion. you could attempt supair BUT with a tippmann and spyder you might be a bit outgunned by the egos and angels etc etc which are used. the ion would hold its own.