GILC

Is have a 56 Reg IS250 SE with the Halogen low beam headlights. I was wondering if it was possible to switch them to Xenon without too much hassle. I don't want to use an aftemarket HID conversion kit because they lose a bit of the beam pattern. I was thinking about switching the entire headlight assembly or just changing the Low beam projector with an HID model from the IS 250SEL. Any ideas - comments?