Im impatient to see the exchanges too. I dont have preference but it will better for sphere to hit some high volume exchanges. I see that the community is very impatient too, but some of us here seems to want to avoid hitbtc. So lets see.
For listing on a high volume exchange they need to hit certain volume on other exchanges first.
Binance and Okex are very high volume exchanges, but listing on them isn't that easy. You need a very good product.
In exchanges like NextExchange and other open voting, there is a great possibility to make initial volume together with another intermediary. What's more, we have a solid community to help with this election, and they greatly value the project's potential to accelerate listing