New or polished headlights will really help make the front end look good, besides rattle-canning the bumper grilles. My 2002 Boxster headlights were so far gone that they weren't worth trying to polish - the light lenses themselves were brown and burned. I can't remember where I found my Magnetti Marrelli branded headlights, but they weren't that expensive, and they made a huge difference to the looks of the car (and much better light output, too).