I have a Samsonite 17 inch small cabin luggage trolley bag which has a laptop pocket also. The size is just perfect for a cabin luggage and yet it is spacious. The outer cover is hard enough to protect the bag from getting damaged. The wheels and the handle is of nice quality and it is very easy to move.
There are many pockets inside which gives u enough space to store whatever you would need to carry for a week long trip.