If you are looking for a piece of carry on luggage or just a piece that you can take away with you for that weekend break; then check out the Tarmac Plus One from Eagle Creek.
This compact piece gives you the convenience of wheeled luggage, with the size of a decent sized back pack. Not only that, the Tarmac Plus One has a dedicated laptop sleeve, front pockets for smaller items and the front section can be removed to give you a versatile daypack.
Material: Helix double box, Helix dual ripstop, 1680D ballistic, 210D nylon oxford
Volume: [Total] 3050cu in (50L); [Daypack] 950cu in (16L)
Dimensions: [Total]14 x 19 x 15in (36 x 48 x 29cm); [Daypack] 13 x 17.5 x 4in (33 x 44 x 10cm)
Pockets: 1 Front organizer, internal laptop sleeve
Backpack Straps: Yes, on zip-off daypack
Weight: 8lbs 8oz (3800g)
The Eagle Creek Tarmac Plus One Carry-On Luggage retails for around around $275 @ Amazon