I'm sure the CM-7777 will do well. However the published noise specs of the PA-18 are lower (less noise is better) than the CM-7777. We're talking about 1 dB difference, not worth getting in a snit over.
http://www.channelmasterstore.com/TV..._p/cm-7777.htm
http://www.antennasdirect.com/store/...e_amp_kit.html