i have no problem with my HID kit. since my WRX is an 06(which comes with projectors) i know what you're talking about. about three days ago, i took a dirve in Juan's car(07 WRX) and compared with his stock halogen lights, and mines are alot brighter.
Even though ive seen some other brands of HIDs with bluer 10k im VERY happy with mines. Nitro this is coming up because b0ki's 10k looks alittle bluer than mines.
Could each brand come with a diffrenet K level?