Unfortunately if you are a city person like I am, I don't see how can any cities in the other countries compare with Bangkok.
I am just so used to all the conveniences, like food delivery, the choice of restaurants and really really cheap prices I pay here in general. They really delivered here on Western conveniences, shopping malls and rail network. The best part is you can live somewhere in Samut Prakan or Nonthaburi and pay extremely cheap rent, yet still have all the conveniences of a big city.
Just because beer and visa options in Cambodia is cheaper I am sure you will be paying much more for other things.