If the discs are in good shape then leave them. You should through about three sets of pads before you need to change the discs.
You may get a slightly spongy feel on the brake pedal, but after perhaps a dozen brake applications in normal use they should be fine.
Brake pads, although a vital safety item, are very simple to change unless you need a tool to wind back an incorporated handbrake adjuster. 207's don't have this on the fronts.