Yeah, when you start messing with the color of regular incandescent bulbs it can really reduce the light output. I plan on using the DDM 35W 4500K kit, since I'm much more interested in function over form. I am hesitant to use the 55W kit (without relays at least) due to the increased current and heat generated within the housing but it should be perfectly safe to have the 35W HIDs with stock wiring.
-Wes