i like modern day auto's to drive, generally most are nice and smooth these days but personally as an ex peugeot mechanic and the amount of auto boxes we had to replace i wouldnt buy any auto myself, way too expensive when they go wrong and with modern boxes a lot of back street garages dont want to get involved as theyre more specialist jobs.
i had a mate with a merc sprinter and in the 5 years he had it, it had 3-4 replacement gearboxes under warranty.
i remember peugeots auto gearbox warranty returns department at coventry when i went on training courses, they was always stacks of them out back!!
if your going to buy one just make sure theres no leaks and every gear change is smooth and go through them all inc the manual option if it has it.
good luck