Well, the homeworld of both the Quarians and Geth is Rannock (or however you spell it). In ME3, if they both survive, the Geth offer to help the Quarians resettle on the planet. They even begin to help them gain back their immune systems (your character would probably have a decent enough immune system, Saarebas). If they both survived the war, they would have to be coexisting. Although, as you said, it is reasonable to say that there would be groups of Quarians that still don't accept them, probably offworld. 

At any rate, I am eager to join as a Geth. There is one suggestion in terms of technology I'd like to run by you. In ME1, they had guns that could cool on their own, but it took a while, so they replaced them with thermal clips to cool more quickly, but it required them to sacrifice the former cooling tech. In my mind, the natural progression of that technology would be guns that could use thermal clips, but when they ran out, they could still cool on their own like in ME1. What would you think?