The best schools and some of the better towns are located right at the junction of northern Delaware County, eastern Chester county and southwest Montgomery County. There is a bullseye near Villanova, Gladwyne,Radnor,Berwyn which is ultra wealthy. New construction starts at $1.5 M on up but the surrounding areas are very nice and somewhat affordable.
I would suggest towns like Newtown Square,Media,Upper Providence,Garnet Valley area in Delaware County.
Plymouth Meeting,Lafayette Hill,Fort Washington,Flourtown,Springfield Township,East Norriton,Gulph Mills,Upper Merion,King of Prussia,Valley Forge,West Conshohocken in Montgomery County.
Wayne,Chesterbrooke,Paoli,Devon, Tredyffrin,Malvern,West Chester,Exton in Chester County.
If you look at a map, you don't want to go too far west of Rt 202 or too far north of RT 76 if you don't like the country setting.
If I had to give you an intersection to branch off of and explore it would be Rt 30 + Rt 476
