4300 is pretty close to the color of a quality halogen.
to much "yellow" in it for my tastes, so i put the 6ks back in.

 

You need a relay on the stock harness.

I used to run HIDs through my stock harness and i would get constant flicker

 

ill further state it, you do not need a relay on your stock harness, if you do there is something else going wrong. The stock harness can carry plenty of current and voltage to safely power the HID Ballasts

 

but if you have a sound system and a light system wont it rob the power
when the bass is kicking?

 

yeah it does that on any car or truck if your suckin enough power with the amp.. i've got an 800 watt amp and just installed my 6000k hid kit last night and it really hasnt made mine flicker or go dim yet so you should be ok unless your goin with a big ass amp..

 

4300k is OEM on alot of vehicles but ive heard now some of the car manufacturers are going with bulbs around 5000k - 5200k (correct me if im wrong). I myself have 4300k in my projectors but have 6000k bulbs waiting to go in.

 

yeah 4300 is the usual on most factory cars and suvs that have hid.. i think cadillac and nissan uses something closer to 6000k judgin by the color.. but im not sure bout that though.