Virbank City.
The city is pretty cool itself, the sea flows underneath the bridges and it overall has a feel of "modernity"?
Super close to a calm and comfy rural area, perfect for walks and pic-nics; and also to a big and active metropolis with great job opportunities thanks to a practical ferry service. It is also possible to find a work in the Pokewood or in the industrial area.
Pokewood right next to it also means acces to film previews and possibilty to meet famous actors.
It has a kindergarden iirc, if you have children.
The gym leader is a cute loli and is in a rock band, which also means frequent live concerts.
Plus, the music is super chill.
http://youtu.be/q4_Hyk8SjicPerfect city.