I was wondering what brand and weight of insulation everyone likes for their hunting boots.

I have an elk hunt this fall in Colorado. We are going third season this year. And we usually go second season. I'm wondering if my ultralight meindl boots by cabelas in 800 gram are going to be heavy enough. Thinking maybe I should go to 1000 or 1200 gram. Or maybe its not worth the money for the extra couple hundred grams.