Well I guess since this topic's been reopened, and I now own a different car I can respond again!

I guess my favorite would be this one, I just love the color:

http://www.imcdb.org/vehicle_145127-Mercury-Grand-Marquis-1988.html

Though this one is quite nice too:

http://www.imcdb.org/vehicle_63018-Mercury-Grand-Marquis-1988.html