Quick question...I don't have an HDTV yet, but when I do, I definitely want to use a roof antenna to get locals. Question is, do I get just a UHF antenna or a VHF/UHF antenna? After the 2009 mandate to shut down analog broadcasts, will the stations move their current UHF digital broadcasts to the VHF stations that they are usually on (making a UHF-only antenna obselete?) BTW, I'm in Pittsburgh, local channels are 2 (KDKA-CBS), 4 (WTAE-ABC), 11 (WPXI-NBC), 19 (????-CW), and 53 (WPGH-FOX). Also, best roof antenna to get? Thanks to all who read and reply!!