I bought my 32' Thomas HDX from the Clark Co. School Dist in Las Vegas (rust free). It's a rear engine CAT 7.2 w Allison 3060.
After doing the roof raise in Vegas we drove it back home to WA state. Absolutely a jewel to drive (although loud due to everything being ripped out and not spray foam inside to keep the panels quiet)!
For me it's the perfect size.