anything over 6000k starts to look tacky, 4300k or 5000k is what i'd go for.

price wise i've had a few sets and they all seem to perform the same, the £30 set in my van gets the same use and has lasted just as long as the £60 set did in my passat.

the only issue i had was the colour rating, the cheaper set looks slightly higher than the 5000k they were rated to. but it'll be like all things cheap, you pay the money and take a chance, but i reckon 9/10 times they will be fine