Here are some other really low noise figure TV band amps to consider:
http://www.kitztech.com/ (VHF & UHF, 24 dB gain, 0.4 dB NF)
http://www.researchcomms.com/television.html (UHF-only, 20 dB gain, 0.4 dB NF)
With both of these companies, you must provide your own weather-proof enclosure if you want to install the amp outdoors.