2007 Sun Voyager/Yellowstone purchase help

[MikeandMe]

Thanks in advance for the help, everyone. My wife and I fell in love with this floor plan, and have looked at both of the diesel models pasted below since they are local. I know there are pros and cons of gas versus diesel, but we came across the gas model online also listed below.
Even though we would have to travel out of state to pick it up, I'm really thinking that the gas model would make sense...20k less than the diesels is a lot of money. It's just us and the dogs, hitting the road for a week or two every couple of months, not full timing.
This will be our first purchase, and we greatly appreciate any advice, thanks.

http://www.prosalesrv.com/rv/colleyville+tx/gulfstream+classadiesel/458/gulf+stream+yellowstone+sun+voyager+`

http://www.dupontregistry.com/autos/...itemid=1255614

http://www.rvt.com/rvdetail5041798.htm

[bluefox]

test drive it or better still ask to use it over the weekend. But make sure you drive it at 65mph. The different in cost can by lots of Gas. But if it doesn't handles good you won't want to drive it.