Dump body for ram 5500

looking to spec out a dump body for a new ram 5500. Going to need a 9' long mason dump body no drop sides or any special features. Upfitter has a Voth body they're pushing steel body with aluminum cab guard. Not entirely sold on it. Any opinions on manufacturers? Dealer likes airflow but they seam cheap. Our old 650 had a rugby and it seemed to hold up well.

Dump body for ram 5500