I bought the truck lites to put in my alfa. Light output is great, and it has a very defined light cut off. I think they have better output than the factory hid in my bmw.
They are a standard 7 inch light, completely plug and play. I am planning on putting a set in my 944 when I get around to it.
Truck-Lite - Catalog Product : 7'' Round LED Headlamp, Complex Reflector Optics Design
However, the issue with all of the led head lights is that they are terribly ugly.