You are living the easy life. The Tv stations are strong and easy to receive. I recommend a Winegard MS-2000 antenna. Mount the antenna above the roof in such a manner that the antenna has a clear view in all directions. Here is a antenna mount that will likley work well for mounting the antenna.
http://www.sadoun.com/Sat/Products/Perfect/PVEM1.gif , a Ronard 4560 or ChannelMaster CM9030. Here are places to buy Tv antennas and etc. ,
http://www.solidsignal.com ,
http://www.starkelectronic.com ,
http://www.amazon.com ,
http://www.3starinc.com