Philips do different sorts of H7 bulbs, the main ones being the X-treme, Blue Vision and Vision Plus.
The Blue Vision bulbs give you that crisp white light, and give about 30% more light output than a standard bulb.
The X-treme and Vision Plus bulbs give 80% and 50% respectively extra light output compared to standard bulbs. They do look slightly whiter, but they are mainly for increasing light output.
Whiter light doesn't automatically mean better vision, it's the light output of the bulb that's important, not the colour temperature.
I have the X-treme and they do make night driving a lot easier, coupled with the Vision Plus bulbs in the main beam
A good place to buy them is here
http://www.autolamps-online.com/