I agree with Allentown. No doubt the 5.0 is cool. However, I'll take the proven reliability of the 4.6 over the not proven 5.0, at this point. I don't recall the 2010 models being on hold forever at Ramp 51 for "quality issues"!
Based on that "logic", Ford built an inline 6 from 1965 to 1996, therefore that engines record of proven reliability trumps yours by several years. As a matter of fact, it ought to be enough for you to yank your 4.6l out tomorrow.
Good luck with your mighty 165 HP motor