Just curious if most people use the supplied antennas that come with their receivers or do they upgrade their antennas? I have a Yamaha TX-497 tuner that I run in one of the inputs on my receiver and the stations come in terrible! Any suggestions on what might be wrong or good antennas to buy? I saw this one on Vann's website that looked okay. http://www.vanns.com/shop/servlet/item/features/750019241/terk-am-fm?s_c=site_search