Having projector spots on the side of the radiator looks fine.
My fear would be that if you did have a low side off or even just drop the bike while at a stand still would the spots not wreck the radiator? This would be bad enough if it were to happen getting it out of the shed or garage or putting it away, but should it happen 50 miles from home you are now in serious trouble with a busted radiator and no way of riding anywhere.
As Darrsi has said the projector spots are absolutely brilliant and really illuminate the road ahead, I have my spots focused ahead at about 30 feet to the centre of the beam.
I find this position does not dazzle oncoming drivers but really lights up the edge of the road and give good warning of debris and road kill you would sooner not ride through. the spots that I fitted I can only describe as shockingly white and just nudging up against a smallest hint of blue.
I have a pair of H4 Xenon Ultra White competition bulbs (Halfords) in my 2003 reg FZS600, now when I put these in they were so much whiter that the standard H4 halogen bulb, but with the spots switched on they still look yellowish.
I will go the LED route, but it appears that the wire retaining clip that holds the bulb in place seems to be hindered by the heat sink that is on most of the LED's making it impossible to fit. if this is the case, it makes me wonder how they are fitted to cars as the H4 fittings all look identical.
I had to take the 4th picture named 'OK' from above the projector beam because the beam is so bright my camera phone refused to capture an image.