This site is fantastic. Plots of NEC4 calculated gain and "achievable gain considering impedance mismatch" over the entire HDTV channel range. http://www.hdtvprimer.com/ANTENNAS/comparing.html Looks like the ChannelMaster 4228 comes out on top. It comes assembled in a 4x4 FOOT box! Amazon ships it for 8 bucks. 73 de Brian/K3KO