targeting affluent searchers with adwords

i want to setup an adwords campaign to target more affluent people. i'm thinking i should target those using apple computers or ipads. i dont care about iphones. its not the sort of product people search for on-the-fly, on-the-go.

can i do this? if not, on a more macro level, can i at least just target safari browsers which tend to be apple people?

also, how specific can you get with geo targeting? for example, if i just want to target people on the upper east or upper west sides of nyc, is this possible?

please advise. thanks in advance!