We live in Stifford Clays, which is between grays and orsett. You should get a 3 bed for your budget round here. Mainly ex council houses so well built, and they tend to be sold quite quickly.
There is a bus service but its patchy. If I need to go into London for work I drive to lakeside and get the train from chafford. The drive to bethnal green is around an hour in the rush hour, more if theres traffic.
When the dartford bridge is closed, or theres an accident on the a13, traffic locally can jam up, but Im hoping the new crossing (if it ever gets started) will ease that once its done.
Its better than grays here and does have a community feel to it. The primary is good and the two local secondary schools are good, although one is only a year old.
We are only a couple of miles from grays town centre, but it feels so different to grays. We've never felt unsafe round here.
We plan on moving in the next few years, but only because we want to downsize, but would happily stay in the area.
Feel free to PM if you want to know anything more specific, but I wouldn't dissuade you from moving here.