Having just gone through the process, I would only advise you to take your time, do a lot of research and reading, and look at different makes and compare quality. We were originally looking for an older (2005-2007) class A gas motorhome in hopes of spending less and hopefully have the sale of our truck and travel trailer cover the cost of the motorhome. After looking at a few units and seeing many problems, we decided to up our budget a bit. We were also looking at finding one that had been stored indoors and well taken care of.
My research resulted in determining that Winnebago/Itasca, Holiday Rambler, Tiffin and Newmar were the preferred manufacturers. We purchased a 2012 Newmar Bay Star 3302 and we're about to take our first trip, although we spent two nights in it when we drove it home from PA.
Good luck in your search....be patient and be careful!