Sometimes you get so involved with something you can lose a little perspective and its good to have people challenge ideas to put you back on track. I doubt trained actors are required, that really is overkill, the voice sounds fine. A little more TLC with the voiceovers to match the scenes in sound quality (i.e. not sounding really dubbed) and matching the voice to the face/lips and IMHO its going to turn out really well.
Still think you share a passing resemblence to Hayden
but with a deeper voice, which is a positive in my books as if it didnt, I think it would be too much of a leap for most people to mentally adjust their ears too ...(if you can mentally adjust your ears, but you know what I mean!)