Black and Decker Firestorm HP188F2B 18v Circular Saw

The Black & Decker Power Drill is a pretty good drill/screwdriver. It comes with two batteries and a separate charging station, so you're unlikely to need to slow down your work when it runs out.

And as a bonus the power indicator gives you some idea of how much life there is left.

It's got a hammer action, essential for masonry. And it also has a whole range of torque limits to use it as a screw driver.

The side handle is removable and adjustable, which makes it a tad useful.

It comes with a screw-bit, and helpfully some rubber recesses to allow you to store a spare bit. The keyless chuck also aids in quick bit changes.

As a drill it's great, the portability is a real bonus. As a screwdriver the variable speed and massive amount of torque actually make it pretty useful for that too (I often use it instead of my electric screwdriver).

The box it ships in is handy to keep it and it's charger, but also has space on the front for storing screws and bits.