I'm partial to Hino's but Cummins would be my second choice. 2015 Hino's went to a post injection and 7th injector setup and went away from the older more problematic burner setup. They are much more reliable and have less maintenance. Hino has a standard 5 year 250,000 extended engine warranty and a 5 year 100k emissions warranty. They essentially use the same DEF system as most other manufacturers, Bosch Def pump and injector. They are great comfortable trucks. Now full disclosure here, the dealer network has a smaller foot print than some of the other manufacturers. Depending where you are, service may be harder to find than say a Cummins dealer. Do some research and look at the dealer network online. They can be expensive to fix, but all manufactures are at this point. I am a Master Elite Hino tech, ASE Master certified, Mack and Volvo Master certified and have all my Cummins automotive certs. ALL after-treatment systems break and are expensive to fix. I don't care who makes them, they all cost money. If knowing what I know and was in your shoes I would buy a 2004-2007 Hino, from the south or from somewhere out of the rust belt.. When I was in Florida we would get in units with 500-980k miles regularly. You don't see M2's with throwaway ISB Cummins out there with that kind of mileage Cat midrange engines are also throw away blocks. Hino uses Meritor Axles, Spicer drive-lines, and Allison Transmissions FYI. That is stuff any dealer can work on. The engine itself, the J08 has been in production in the US for 15 years with minor modifications to the block. They have essentially been building the same engine for 15 years because it works. Anyways just some food for thought. Good luck.