Well the pic that is displayed right now is an OEM bumber with a Xenon lip kit.
I'd swap to a 98-00 bumper and get a WW W-type kit if it were me...but then again that's just my taste, I have a WW kit.
Honestly...the WW lip for 98-00 installed on an 01-02 front bumper doesn't look all that bad...there is some small gaps on either side of the grill, but it's not too bad. If you have black I'd say do it in a heartbeat cause you woudn't be able to really see it that much.
But if all you want is a front lip, I wouldn't get the WW, it sits low enough I think it would look funny without the skirts and rear lip.