What Head Unit?

I am new to this forum and have been reading for the last 4 hours but can't seem to zero in on which unit to purchase. I am installing this in my motorhome for navigation, radio, OBD Torque, and bluetooth. I don't need DVD and would like to avoid it possible.

I would obviously like the most powerful unit with the most memory. I was looking at the Newsy NR-3001 as it seems to have the most support. Is that correct?

If t's not what do you recommend? Which one has the best radio chip?

Thanks!

Download from this link