Not sure what your road rules are for aux lights in "Dirty Jersey" but here if they are higher than the headlights you need to keep them covered when on public roads (unless you are running a snow plow that obscures your headlights)
Also if you want the light for driving in snow you might find snow building up on the bar on the hood exactly when you want to use it. I would go for the grill.
I replaced the halogen bulbs in the headlamps on my Ridgeline with LEDs. I was concerned the whiter light would be glaring in falling snow but it has not been an issue at all.
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