Couple things I forgot to ask before....

I always used the Bentley manual for the BMW and I was dismayed to
see that they don't publish one for the 850. I've got a couple of haynes
manuals for the BMW also and they're horrible.
What DIY-type service manual would you all recommend?

Also, I plan on changing the low and high beam headlight bulbs
from regular halogen to either xenon or ultrawhite bulbs.
I believe, by observing the car with the headlights on low/high, that the
low and high beams are separate bulbs.
what is the wattage of each bulb from the factory, and am I asking
for trouble if I bump up the wattage (say, from 55w to 100w or something)?

Thanks again....my flood of questions has probably just begun
but I'll try to keep from endlessly yapping

Tim
91 318iS
96 850R future car, and i'm already at the forum....