You might be in an area where the extra bark and bite of the .223 round would be unappreciated. I'm often invited to hunt groundhogs on farms. Centerfire rifles are a bit of an overkill and could prove dangerous due to overpenetration or ricochette. Although I currently use a regular .22 round, the .22 mag could give me the extra range and punch to harvest a few more 'hogs.
Personally, I have a serious desire for the Ruger 77/22 Magnum Laminated Stainless Rifle. I get to visit the one at my local dealer almost every week. I'm sure they think I'm mad- asking to look at the same gun every week... It's not too heavy, not too light, varmint type stock, has a lovely matte "iron grey" finish on the stainless which I've been trying to duplicate (without success so far), and while the trigger might need work, I think it would be a real shooter.
If you're not a reloader, and you don't mind paying the premium, the .22 mag will serve you well.