Team heko deflectors are generally what every one goes for, they fit inside the edge of the windo runners and clip in place meaning no unsightly bits of plastic glued to the out side of the car.
Get them on eBay very easily from reputable sellers and be sure to order the set of 4 for a 4 door car as it looks a bit odd just having the front ones.
About £25 - £35 for a set normally