Welcome to the forum, corbett692. Yes, the Vista is considered an "entry-level" product in the Winnebago Class A category line. That doesn't automatically mean it's poor quality, however. My opinion is that Winnebago makes a good product even in their "entry-level" products. They have very good factory support and have a lot of good dealers in their network. In their gas Class A model line, their current hierarchy is this:
Itasca will have corresponding models. The Sunstar is the same as the Vista in the Itasca line.
Take a look at some of the threads in the "Winnebago Owner's Forum" of iRV2 HERE
And look through this ongoing thread where a lot of satisfied (and some not so satisfied, hah) owners are expressing their experiences HERE