Ewan, you are a man after my own heart… a commercial 110, and you still have a piece of cardboard beneath the pallets

I’d do exactly the same!
Re the jump seat - the centre console is nice but the jump seat folded down is not bad as well - decent height armrest, cup holders, charging point, storage all integrated in the back of the third seat, so when folded, still very functional. A friend with a 110 commercial has it and whilst not as aesthetically clean as the fixed console, practical and functional imho.
As Ewan will attest, the only change between the 250 and 300 engines is a remap - so if one desired more power, you could always have it remapped once it was out of warranty; however, I am yet to hear anyone complain about the 250 and the torque is more than adequate for towing.