I went ahead and got a set of H4 PIAA extreme whites for my LS400. Installation was rather a PITA (did they have to cover up everything???), but I managed to do it without breaking anything.

My initial impressions were good--they look white (not blue or purple), and also bright. But I noticed as I drive in the rain, the old OEM light seem to light up the road better.

Also, I noticed that when the car sits in the sun, the blue bulb reflect in the headlight housing, and it looks blue It kind of has that ricer look, and I don't really like it.

I'll try them out for a while anyways. I'll post pics when I get a chance.