I have both the Samsonite Skywheeler 2 Upright 67cm and 55cm. 'Skywheeler 2' is the updated 'Skywheeler' Series. Main changes are a different rubber protection lip over the zipper and slightly different design/colors. The 'Upright' ones have two fixed wheels whereas the 'Spinner' ones have four wheels.
Personally I'd go for the updated series as it makes the old one look cheapish. Also I'd opt for the Upright versions (personal preference).
Size wise the 67cm one is perfect for a one to two week trip.

So far I only noticed small scratchmarks and a big plus is that stickers peel of easily from the poly carbonate surface.