Follow-Up:
No, there really isn't. This is really just my opinion, and I'm sure that there are others out there who have found a Rialta-ish vehicle on a Chevy/Ford/Dodge chassis that has worked better for them, but I don't think the problems that people are typically reporting with the Rialta are worse than can be expected with any motorhome. Like I posted in an early response, it is not uncommon for a motorhome to be refused service at a Chevy/GMC/Ford/Dodge dealership due to size of the motorhome.
Here is a link that might be useful: www.MotorHomepage.com