just to bring truth to this thread. The Stock OEM Phillpis bulbs are 4300-5000K Of course there is tolerance built in to everything. Please also remember the bulbs will color shift some. So a tested 4300 bulb actually shifts closer to 4600 after extended use

Very true. Often times factory HID equipped cars will have a 5000k bulb installed as a replacement when one burns out, even though it came equipped with 4300k from the factory. This is to better match the remaining bulb.
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on my dads 05 lesabre he just had one light go out so i baut a set of silver starsfor him, I really like them. Theyre not super expensive, theyre really bright compaired to what it had and i dont get hassled by the cops.

My Bonny has SSU'* and I really like them. My wife'* Mazda has some SS'*, I like them too. The only reason I'm going to HID'* soon is because I'm doing the projector retro-fit(well Sawgunner is but ya know), and those come with HIDs.

In my experience, and opinion the Silver Stars are quick and easy, and look good. They give you a semi-hid look with a bit of extra light. The drawback is they are pricey for what you get. I've had 3 sets now, and all of them burned out in less than a year. The first set only lasted 3 months. I contacted Sylvania and they refused to do anything for me. Still they are a much better option than the cheap blue bulbs that claim to give you the xenon look. These things are dangerous, because actually put out about 1/4 the lumens of a stock bulb.

The 35 watt HID conversions put out less heat than a stock 55 watt bulb, and 3 times the light. That is if you choose 4300 to 6000k. 8k and higher starts to take a hit in lumen output. A decent HID conversion can be had for about the same price as SSUs, and will outlast them 50 to 1. I just purchased 3 sets of HIDs (35 watt low, high, and fog) for my new Bonneville @ $40 a set delivered on Ebay. They have the slim digital Xentec ballasts. I've been running a set in my 02 TA for quite a while now, and they seem very reliable, and exceptionally bright. If you like to go fast at night and see where you are going, go for the 4300 to 6k units. Mine are all 5k.

im running 8000K hid in my heads and fogs.. and i love those..
dont do 10000k.. itll look nice.. but not that good of an output