For a simple and sturdy way to transport your precious tech when on your bike, check out the Rogue from Timbuk2. As a top loader, the Rogue is a bit of a square, but the geek look is pretty cool. Definitely for the urban cyclist, its outer is made from water-resistant TPU and the whole design feels tough enough to cope with the mean city streets.
There’s a decent sized internal compartment, big enough for a 13-inch laptop we’d say and zipped outer pockets. You also get external webbing for attachments and straps to keep everything in place. The shoulder straps are adjustable, although they are quite close together so perhaps not the most comfortable if you are really broad across the top.