What's the best tv antenna preamp to get?



How is the winegard preamp working? I live down in Mississippi about 60 miles from the Memphis stations. I have an antennas direct DB8 mounted on a pole out back about 20 feet high. Late at night I can pick up CBS and ABC from Memphis. No ION and no CW(FOX and NBC) are VHF. Gonna need a VHF antenna for those. During the daytime I don't get a signal at all. Wondering which preamp to try. Winegard or the channel master 7777. I have a PBS station 15 miles east but all I want is the Memphis stations. Wondering if the close PBS station will affect the channel master 7777 with overload. Any tips appreciated.