Let me preface this by saying I was pretty happy with my stock headlights, in sharp contrast to most of the folks on this board.
I got a good deal on some HIDs, went for it.
These are just replacement bulbs, so if you don't like the stock pattern, that AIN'T GONNA CHANGE. You will just get more, whiter, brighter light.
I think my package was the "older" design, with integrated ballast and starters. Coupled with them being a bit large, I didn't even try to fit both under the windshield area.
I found a great place to mount on on the left side, hard bolted, and a zip tie to ensure it doesn't rotate down and rub on the radiator hose. This is looking at the left frame spar, just under the top cover panel between the fairing and frame:
