In a nutshell, the roof-mount Winegard Trav'ler is a single-arc antenna. It must be set up for either the eastern or western arcs and, in order for it to be converted from one arc to the other, the LNBs and switch must be changed out. The only automatic portable capable of receiving both arcs is, as mentioned, the Pathway X2. It is an excellent antenna, but is a single LNB antenna. This means it can only see one satellite at a time. It will serve two TVs/receivers at the same time if both are tuned to channels on the same satellite.
Rob