I preferred the drive of the 6.1, but its very much a personal thing. Try a couple and decide for yourself.
Ditto the spec. DSG is great, but requires additional periodic maintaince and while its generally pretty reliable it isn't immune to problems. My van is a very long term ownership proposition so avoided DSG, 4motion, etc, on the KISS principle. However, your priorities are liable to be different so have a think about what spec suits you.
I would avoid any Startline that does not have the business pack. That adds cruise, aircon, Thatcham 1 alarm, and a few other very sensible bits and bobs. If nothing else youll probably curse the absence of aircon on a standard Startline.