I would go either way. I have 8000K headlights and 6000K fogs on my chevy. I think the 8000K gives the car a better look, and displays the fact that they are aftermarket, but I think 6000K has better visibility.
Don't get me wrong, I can see great with my 8000Ks, but there are some visibility issues. Mainly off to the sides of my car on backroads. It just makes it a little more difficult to see deer. On the same note, the HIDs light their eyes up like none other; granted, they aren't always looking at you.
Anyways, I can get pics up of the two if you want to see the color difference. When they are one above the other, it gives you a better feel of the exact difference.
Either way, HIDs IMO were definitely worth the money.