My 2004 truck had a bolt on setup with wrap around the headlights.. Looked great... We travel the back roads alot here on the East-South part of the US and I guess the two bad encounters I had with deer were in Alabama and Arkansas...
In both cases the deer was knocked under the truck. It seems my two tow grab hooks did that for me not the grill... You certainly want the deer to go under the truck and not up on your windshield... I Arkansas I missed the first deer but the second one zero'ed in on me - no escape haha... It was pitch black no moon 11PM or so and I was only about 15-miles from a town so I kept going.. Pulled off when I got to some town lights to see what the damage was... Only thing I saw was deer 'feathers' around the front hooks. That late at night i guess the deer was running from dogs perhaps...
My new 2010 truck doesn't have the guard yet... I'm still planning on getting one...
Roy Ken