Just posted this exact same post in another place but here you go:
This: Mountain Horse Stella Polaris Winter Rider
I don't know what else to say but AWESOME. And yes the boots are expensive but I'll have mine for years. They are great quality boots. They are wonderful without the warmers - only use the warmers on days when you'll be out at the farm for a good 4 hours and the cold is unbearable. Even then you'll only really need the toe warmers towards the end of that time frame as the boots do a really great job of insulating.