I shot a big cow last week with a T3X in .308. Not an ultra lite, just the standard T3X, but it's as light as I'd want a hunting rifle to be and I've hiked many, many miles with it in the sling attached to my pack, under my right arm. Every time I shoot that gun or hunt with it I go away wondering why I mess with anything else. I've killed 2 elk, a black bear, and probably a dozen deer with it.
I've gotten into the build-you-own trend, but if I were to buy another factory rifle it would probably be a Tikka.