Show me a kit for around 400 bucks that uses very high quality bulbs and ballasts then because I want to see it. So far I think I might end up getting mine from Xenon Depot since that's where the people with BMWs go.
Did you not read the Mister Jung site at all though? Here, just read this, and this is only 7500K.
The 7500k kit incorporates a blue coated bulb and is the most colored kit I sell. It doesn't compare to anything stock, it's a nice deep blue color that will get your car recognized. Unfortunately, due to it's higher color it is the least brightest kit, rated at 2400 lumens... But that's still twice the light as you get from most halogen systems!
In order to reach a color of 7500K the bulb has to be coated blue. If you go higher (for ex, the 12000K) then the system will most likely
1.) come with a bulb that will be coated with even MORE color
2.) put out way less light
3.) be completely fradulent in its advertising if the bulb is not coated
And I thought Silverstars were proven to put out more light than the stock halogen bulbs?
EDIT: After checking the Mister Jung site again, his brightest HIDs are 3200 lumens.. So if the lowest you've found is 3100 then I really wonder about the correctness of the information. Without a good photometer you can't really say how bright they are, and I bet most people that do make these kits just look at it once it's installed, give it a color rating and guess how bright it is, and put that up without even thinking.