Xenon is the gas they put in the bulbs to get them that color. I have seen the PIAA's on my friends talon, i don't recomend them if you want a color of HID, they look pretty normal, and their 160 CDN bucks.. cheap ones are like Eurolite Xenon (quite blue) and good colors are called Crystal white i believe, something with crystal, their less yellow then normal lights, but not that blue color, and the cops won't stop you. (at least here)
As for wattage.. DON"T GO OVER THE WATTAGE OF YOUR STOCK BULBS!! I have done this in my car with normal lights that are 60-80, and put 80-100 watts, and it starts causing problems with electrical stuff, wires aren't made for that kinda of power, and switches go cause they aren't either.
Just thought i would dicuss some of the stuff i know, i am into the import scene so i know quite a bit. Hopefully be owning my friends R6 though =) ( i know its not a R1) Also you can get cheaper HID's, from places like APC, but haven't had experience with them yet!.