West Chester to Plymouth Meeting is a big hub for job growth in this area. King of Prussia is right in the middle of those two towns. SAP is one of the largest software firms in the world and they have their US HQ's in Newtown Square Pa.(Delaware County-15 minutes from KOP)
The area is known more for pharmacueticals than software. This certainly isn't the Bay area in regards to software presence but the Philadlephia area has a diverse economic mix which makes it an incredibly stable place to put down roots.
The best school districts in the area surround King of Prussia.
Radnor-Lower Merion-Tredyffrin/Eastown-Great Valley- KOP itself is more known for its immense shopping mall(largest "shopping" mall in the US.) than anything else.
Nationally known Prudential-Fox is a big real estate company in the western suburbs.
Prudential Fox & Roach, REALTORS
http://www.weichert.com
http://www.kellerwilliams.com
There are also a few real estate agents that visit this site from time to time.
Good luck.