I don't normally plug my wife in the fora I participate in, but you might check her out @ http://www.sarelia.com
She built mine; http://www.silversunbeamphoto.com as well as several others;
High end is kind of open ended, BTW. Costs vary depending on complexity. She's built websites for large clients (Hawker Aerospace, Laclede, BioSource) and each client has their own, unique, needs. So yeah, if you need custom application development it's gonna cost $$$$$$$. If your needs are less grandiose, then costs are much lower.