All three of those are great machines. I would go with the Pfaff Passport for the IDT (built-in walking foot), but I think the other two have slightly larger throats. My Mom has the 3160, and it's an absolute workhorse. Normally I would go to the dealers and try them out, but I don't know if that's possible at this time where you live.
Whichever one you choose, have fun with it!