I vote Street flares. But I am biased. I didn't like the look of all the others and how they matched up with the width of the tires. The street flares lined up width wise better for me with stock tires and rims. I know I could have gotten different backspaced rims but oh well. The OE style still stuck out to far and looked silly with the narrow 1500 trackwidth. But thats just me. I am crazy anyway.
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Now that I have put new rims on which are only one inch wider than stock the OE flares would probably look just as good. I have had these on for over 16 years and they still look great with no warping, fading or pulling away from the truck at all.