Almost too many options and just as many opinions. I have a Leupold VXII 6-18 on my 223, and it's fine. That said, if I was gonna buy something new just for hunting, I suppose I'd go with a Leupold 4.5-14 or a high quality 4-16. I have a 6.5-20 on my 220 Swift and I'm sure fond of it, and I used it this morning on a coyote at 80 yards. If you want or need turrets, my Vortex PST FFP in 4-16 is a good option. I like it. Burris has some new scopes that look interesting and I might try one of them. And if I could make myself spend the big bucks, a 5-20 variable might be nice. Geez, too many options...
When you do pick one, let us know what you got.