For a hunting rifle you're not going to use much I think a chassis-style stock would be a big waste of money. The factory synthetic stock is very serviceable. It's not a great stock like a H.S. Precision or McMillan synthetic, but for a hunting rig it's more than adequate unless you plan on frequently using a bipod. If you still want to upgrade, look to Boyds for a laminate or Bell & Carlson for synthetic as they both offer quality hunting style stocks for very reasonable prices.

Take that money you were going to put into a chassis stock and buy yourself a good high-end scope as you'll get a lot more benefit and use from it than you would the stock.