There are no keyboards on the market that have built-in trackpads with the capabilities of the MBP's built-in trackpad.
Why does your wife want a wired keyboard? Has she ever used an Apple wireless one?
I recomend the Apple wireless keyboard and Magic Trackpad without reservation or qualification. I've been using mine for a year now with my late-2008 unibody MBP, and haven't had a bit of trouble with them at any time. The Magic Trackpad works exactly the same as the built-in trackpad, so that when I pick up my machine to use away from my office, I don't have any adjustment to make. And the wireless keyboard has exactly the same feel as the MBP's, so there's no adjustment to make there either.
Your wife should really try these things out.