Can't tell where you are from but I know there is a local place in Reno, Nevada that is very popular. Caravan makes a great steel topper that looks good and is extremely robust. The website is http://www.caravancamper.com/Caravan.swf. The intro is annoying but if you wait you will see the style. They are kind of boxy from the rear but from the side they look good. Great quality and for a small local company they are extremely popular around the area. Don't know if you can get them outside of the area but I would think it would be worth a shot.
Just a side, I don't have one but several people I know do and they love them. Bomb proof is the description I keep hearing. Good luck.