What is the draw towards lightforce lights? There are much better quality lights, and a lot better looking lights in my opinion than the lightforce ones. LED's aren't for everyone, however the longevity of LED's are nearly 100x that of HID's and Halogens, so keep that in mind as well.
We measured an output of a stock stator on DC as 69.6 watts at 8,000 RPM, as opposed to 72.7 watts on AC current. It's a minimal loss, and you gain power stability. Even if you are running halogen bulbs, you GREATLY benefit from a DC Conversion and a battery. Keeps your lights from dimming when you idle, as well as allow you to run your lights when you're parked. In my opinion the DC conversion is a MUST for anyone running any type of aftermarket light.
Also, MOST, not all 35w HID's at 5200-5500K, measured roughly 3300 lumens. That's a little less than 100 lumens per watt. Right on par with the LED's, which will soon greatly surpass HID output (Cree actually has a 15w LED that emits 2200 Lumens). HID technology is actually VERY old. HID lights (HPS, or MH) have been used in streetlights since the mid 70's.
It's totally up to you, but if you're dead set on either HID or halogens, I would shop around for a higher quality light that maybe looks a little better... just my two cents...