The problem you guys have in the US is the dumb CDL where you need a cdl to drive a heavy truck so your stuck with a 3 ton truck.
If I was going to spec a truck it would have 12-23 axles most likely a International with 530 Navistar power with a 9 or 10spd transmission behind it. Ohya it would be on air, juice brakes are crap especially juice operated drum brakes.
A automatic is a money pig when it breaks you can replace alot of burnt out clutches for the price of a rebuilt Allison. Driving a 9spd road ranger is easier than trying to shift a 6spd well for me it is.
If Nick wants a automatic let him buy a truck with a automatic but when he comes back here crying because the juicer blew up again for the 10th time there won't be any sympathy here. Or when he starts belly aching that he has to replace brakes on the truck every three months because of the beloved automatic.
If you do get a automatic tranny make sure you get a Telma brake to help with the braking.
The other option is send your employees to driving school to get a CDL and learn how to drive and shift a truck with a real transmission.
You will need a truck with a 21,000lb rear axle which is bare minimum a 23,000lb axle is better. When you employees try todo bunny hops with your automatic equiped truck you need a tough rear axle
Or they do the drop and stomp at the stop lights you don't want a axle shaft to blow
The worst thing would be some one double dares one of your employees to try do a brake stand with the chip truck to see if they can get 22.5 rubber to spin
Good Luck