Gorgeous country, fun to visit. Not all wines and wineries are created equal, however, and there are some clunkers out there.

Some personal favorites that combine high quality, fair prices, and pleasant surroundings:

http://www.sotervineyards.com/
http://cristomwines.com/
http://www.domainedrouhin.com/home.cfm
http://www.bellepente.com/