I would strongly advice against getting the street cuffs. Masterlock (in my opinion) does not make very good locks. I'd stick with Kryptonite and On Guard.

With that out of the way, if you plan on using a U-Lock, buy the small U-Lock that you can fit around your bike and whatever you usually lock it to. Thieves break U-Locks by sticking a lever (pipe, 2x4, etc) into it and twisting. By minimizing the amount of "free space" you make it difficult to lever attack. If you can get a U-Lock small enough so it only fits around the rear rim and whatever you are locking to, that is ideal. However if your U-Lock is large enough to fit part of the frame as well I would recommend including that because the most important thing is to minimize the amount of free space.

A cable lock can be useful to lock up any other components (wheels, seat, etc) but don't rely on it to keep your bike safe. A pair of bolt cutters will cut through just about any cable lock.

Two locks are better than one, and three are better than two. I carry a NY chain and a cable lock on me, and I keep a U-Lock at my school. The chain goes around my frame and front wheel, the U-Lock around my frame and rear wheel (it's a large U-Lock, I bought it before I really knew better) and the cable goes through the rear triangle, rear wheel and the saddle rails.