Realize that the HBU-55 is big, with a 12' (145") boom length. For VHF, the size really helps.
Compare the specs.
http://www.antennacraft.net/pdfs/HBU55_.pdf
http://www.antennacraft.net/pdfs/Y5-2-6.pdf
http://www.antennasdirect.com/cmss_f...s/DB4E-TDS.pdf
Ok, Antennacraft specs in dBd, and AD in dBi, which is dBd + 2.15.
So VHF the HBU-55 has it way over the Y5713, 9.3 vs 4.9 dBd while the DB4e is better in UHF at 12-13 dBi vs 11-12 for the HBU-55. The HBU-55 will give you a single cable, but I think the Antennacraft antennas all need a balun. You can always add an amplifier later, if you think it will help. If, for example, the antenna connected directly to a TV provides more channels than the antenna split for multiple TVs.