Right now we deploy full size Dodge Cargo Vans (before the sprinter) but have experience across a few platforms. The cargo van seems like the staple and has major advantages. Those being security, extensive aftermarket for storage, as large as you can get without being beyond average height or width, ability to tow if needed. Fuel mileage doesn’t tend to be that great and many of the used models were outdated before they even came out. It seems only within the last 3-5 yrs did we see major overhauls from all the manufacturers. So this means terrible handling, fit and finish, and ergonomics.
The Sprinter is an obvious upgrade to the average cargo van with better efficiency and use of interior space. They tend to be rather expensive which is the only reason we don’t have any in use (yet.) If I was in the market it would be between the AWD diesel Sprinter and AWD Chevy Express. Having owned one before I can say the Chevy Express vans are surprisingly great handling vehicles and have some decent powertrains. The AWD is unstoppable in low-traction situations and the ergonomics were very well thought out. They are also just a bit larger than older cargo vans for more storage.
Cube vans or box vans can be a great asset. Very clumsy to drive around but you can literally take the whole shop with you. Also maximum signage space. We used to use one for prewires only where material could be rather extensive. They make a lot of sense from a utility standpoint but if you need a multi-purpose van where you are meeting with clients one day and in the field the next it doesn’t always look professional (IMO) and they aren’t the best commuters.
Pickup trucks are great for inclement weather but seem to sacrifice convenience for tool retrieval and other in the field duties like if you had to rattlecan a speaker at the last minute out of the weather. I have used one modified with a pull-out bed and canopy and that worked well but still not the same as a cargo van. Also couldn’t fit the really large displays.
The only body style I have never tried is a compact such as the Mini or HHR. If you handle less material probably a good choice. But It doesn’t seem like one could fit any larger than a 42” display which is a deal-breaker for me.
Long story short, my favorite choice is probably the AWD Express. The sprinter is admittedly better but bang for buck I’m not sure you can beat the Express. I have used the “Access” version of the Express which has pneumatic access panels that you can pop out with the key fob and access tools or material without ever getting in. Interested to see what other pros think.