Two Tables, Two Limits?

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I've been toying with the idea of raising the stakes of my 25/50c NL game, but I know that will drive away some of our better donators. At the same time, some other players seem itchy for higher stakes (myself included). We usually have at least two tables, so I was wondering how feasible it would be to switch one to 50c/$1.

Anybody try anything like this? How do you handle people moving tables, considering they'll have separate buyin levels? What if they go back and forth?

Outside of that, will all the sharks be biting after each other on the higher table? Is that a game worth playing, or is good money being a big fish (so to speak) in a smaller pond?

Currently the 25/50c has a $20-$40 buyin ($60 later on). I would make the 50c/$1 a $40-$100 buyin. Suggestions on how to run this smoothly (or stories of your own experiences) welcome.

Thanks!