[rocko]

Well, I don't know about "better" (I like the 3-dot sights), but here's a few different ones that I was able to think of off the top of my head:

http://www.ashleyoutdoors.com/pistol.php?groupshort=PHK
http://www.entreprise.com/Catalog/Sights/hkuspo.htm
http://www.novaksights.com/Sight%20Systems.htm
http://www.heinie.com/hksights.htm
http://www.ptnightsights.com/ (go to color options to see their various configs)
http://www.mmcsight.com/products.html

That should keep you busy for awhile.

Rocko