First thing is, how much do your feet sweat? That dictates how much insulation you'll need.
Personally, my feet tend to be on the sweaty side, so I don't need much insulation, 200 grams is what I personally go for, and no more then that. Overall, my cold weather hunting boot has been a leather pair of Irish Setter Elk trackers. The sole was starting to peel away at the toe, but had that fixed by my local cobbler. A few brads, and some shoe glue, and no problems since. Ive had them for a few years now. You have to maintain leather though. Once a year, saddle soap, and then whatever waterproofing/leather conditioning oil or paste your fond of.
As the year goes on, i'll up the anti on socks and insoles to increase the insulation value. I usually start the cold weather months with a summer pair of superfeet insoles, and summer hikiing socks, and end the year with wool superfeet insoles, with thick wool socks.
That's what works for me, everyones different i think.