Ok here is a antenna that I most never recommend. The Winegard MS2002 Metrostar. Please know that omnidirectional antennas are not truly 100% omnidirectional , the antenna may need to be turned to find a place that receives all the channels you will like to watch. Also know that omnidirectional antennas do not reject multipath (reflected signals) like directional antennas do. An omni antenna can sometimes work , the way to find out is put one up. Be sure and check with the place that you buy it , if you need to return it. Here are places to buy Tv antennas and etc. ,
http://solidsignal.com ,
http://www.starkelectronic.com ,
http://www.amazon.com ,
http://www.3starinc.com