Re: headlights ?
4300K is going to be the whitest/brightest. 6000K is going to be slightly more blue and slightly less bright.
I think you'll be very pleased with either - especially compared to stock lighting.
2013 WK2 Overland HEMI 4x4
Bright White / New Saddle
For Go: Volant / BT Catch Can / Tuned by HemiFever
For Show: Ablaze Diamond Mesh / JW Speaker LED Fogs / Full LED Conversion / VG Shark Fin / Alpine Type R 12