Ok, First "Digital antenna" is a myth, all antennas are Radio Antennas,, ALL OF THEM.. They do not care if the radio signal is Morse Code, Voice, Single Side band, AM, FM, Digital Voice, Digital Data, Analog or digital Television, They only care about Frequency.
Digital TV uses the exact same frequencies ANALOG TV used to use. Just Digital favors the UHF band more than Analog did.. Good reason for this.
Page 2: Which antenna is best.
If you have an RV, nothing, and I mean NOTHING beats a Winegard Sensar IV up on the roof with a Sensar PRO inside the RV to provide power and switching and many other features.. I'm running a Sensar III with Wingman and Sensar Pro here and seeing stations 50 miles out no problem.. In fact we just had a TV problem here (Cable went out) but my overnight shows recorded in studio quality since they came in via the antenna.
If you have a house.. Channel Master has some impressive hardware.. Put it oh, say 100 feet up in the air, and you'd be amazed what it can see (I've done over 100 miles on one of those). However.. That's not practical for the RV, dang antenna is almost bigger (Actually was bigger) than my RV.