luggage
 

suitcase or duffle for two weeks in europe, not concerned about wrinkly clothes.

it all depends on mode of travel i believe. Car vs train? or plane?

plane from US to Spain, small commuter plane to Italy, trains in between.

Roller suitcase. I would not want to carry a full duffle around for any long amount of time.

22-24" rolling suitcase in a basic square-ish design is ideal imo.