MaxxForce = International = Navistar. They've been making diesels a long time, some excellent ones and some not so great. They built the base diesel engine that Ford used (Ford Powerstroke) for many years, but when they designed a new 6.0L for Ford it had major problems. The problems continued for several years and Ford eventually dumped Navistar and built their own diesel starting this year.
The Roadmaster chassis is as good as any, I think. It does not offer an Independent Front Suspension option, but the larger models (RR8R and RR10R) offer a unique floating subframe that handles well and allows the air bags to be mounted further outboard than either Spartan or Freightliner designs. Like many things automotive, I find people who love 'em and others who hate 'em.