Sarah,
We have a 2011 Vista 30W and love it. We've made some modifications to it, so it better fits our needs, but nothing major. We ordered it new and took delivery a year ago in September. Since then we've put almost 10,000 miles on it. The last 5,000 were on a 5 weeks trip from Florida to SD, Montana, Wyoming, and Colorado in late Aug/early Sept. So far the only problems we've had have been minor.
There's a great thread on RV.net, in the Class A forum, about Vistas you might like to read. Here's a post from that Vista 30W thread. I "know" the poster from the thread and from e-mails we've exchanged. They loved their 30W but decided they needed more room so traded it for a Sightseer 33.
"I can tell you there is one beautiful and LIKE NEW 2010 Vista 30W at Spaders RV in Sioux Falls Iowa. It has less than 9,000 miles and about $6,000 of suspension and other upgrades. I bet could be purchased at a fabulous price going into winter. I know about this as we traded it in. LOL We purchased it at the end of January 2011 so it still has a lot of warranty left."
There are deals out there. Finding them is the trick. Takes a bit of luck, and patience.
Happy hunting and good luck finding a rig that suits you.