Monroville said:
If anyone has seen the www.pinkfive.com spots, could it be conceivable to get the guy who does their Obi-Wan impersonations to dub over Ewan's lines? Ewan is one of the better actors in the PTs, but that's not saying much. It wouldn't just be a matter of having someone who sounds even more like Alec Guinness but also someone who could impart a little more seriousness...

Whoever you get to impersonate Alec Guinness, I think that he should try to impersonate the voice of Alec Guinness in an earlier work, when he was younger. I think that the tone of voice that Obi-Wan uses as Luke's mentor would be inappropriate for most of the prequels, as he is not in that role and in other circumstances.