Best places to live in Tokyo?

Question:

Best places for ex pats to live between Chuo-ku and Chofu

Answer:

You want to use Keio line and Toei-Shinjuku line, Right?
How about Chofu, Seiseki Sakuragaoka and Chitosekarasuyama?

According to the site below, these stations are popular.
Fuchu, Sasaduka, Chofu, Meidai-mae, Seiseki Sakuragaoka, Senkawa, Chitosekarasuyama, Shinjuku, Shimotakaido and so on..

Generally, the closer to Shinjuku, the higher the rent is.
I recommend you to consider Motoyawata, Ichikawa-city, Chiba-pref when you have a chance.
It's the opposite direction, but good for living, I think.