She'd be a great Lois and she has the right age, I always preferred Lois to be older than Clark, she's supposed to be an experienced reporter with lots of connections, the last thing I want is a chick who looks like she's straight out of college.
Yeah that's why I always thought Kidder's Lois was so underrated. She was cute (in the first movie, at least) but still felt like the kind of tough, hard-charging, seen-it-all reporter you'd really find working for a major newspaper back then.
Unlike a lot of fans, I don't need Lois to be some hot supermodel type. Although I admit... Rachel McAdams is so freakin adorable I would gladly make an exception for her.