We use a VIP211z in our larger TT with the Pathway X2 antenna. In our Rpod we use a Wally and the same antenna. I like the Wally a little better (its newer) and seem to work faster. But both are equally acceptable and work well.
I would recommend as large of an antenna as your comfortable with because trees/leaves have a big effect on signal strength. To me it was surprising to see the signal loss. Also, depending on your location the combination of receiver/antenna to pick up both the eastern arc of satellites and the western arc is very beneficial. Again trees/leaves and other things may block one arc but the other arc is "visible".
Get the Dish satellite app, uses your cell phone's camera and as you watch the phone's screen and look up into the sky with your phone there are three red dots to denote the satellites in both arcs. With this you can look for a clear shot to the arc.