I have heard good things about the XLR magnesium chassis from a couple people now, I would not hesitate to get one if you wanted a chassis.
If you want a more traditional stock, a McMillan with the edgetech fill, or a Manners EH series stock would work as well, and depending on the stock, could be as light as the mid 20 oz range. Though, with savage being a royal PITA with them changing things like bottom metal, bolt release, center/stagger feed, etc. every 5 minutes, you would want to call and talk with either of them on the phone in detail prior to ordering, so they can make sure to get the inletting perfect. May be a good idea to have a set of calipers ready to measure things and answer their questions.
My cousin got a McMillan A3 in McWoody color for a 110 Trophy Hunter xp (bottom bolt release, centerfeed dbm), and it came out fantastic.