Point is I think they're going to make the choice not based on "looks like Shatner" but more of "he embodies the qualities of James T. Kirk."
They could have both if they would only cast Eion Bailey.

Same with Bailey. He's already demonstrated in Band of Brothers that his persona is "sincere, straight-arrow hero" - that's Kirk's core the way "intelligent outsider" is Spock's core. He's got the right looks, persona and talent, I really don't see what the hold-up is here!