None of the antennas on that page would I recommend.
THe best RV TV antenna is the Winegard Sensar IV (Crank up with wingman) or a Sensar II or III with the added wingman (All about equal)
Add the Sensar Pro "Wall plate" instead of the standard one and you have the best RV antenna sold in the USA,
THere are better antennas but they are designed for tower installs. not RV installs.