Here in Northern WI, we hunt a similar temp. as you and at the same time of year. I have found that 400 gram insulation and 1 pair of medium socks works the best for me. It allow me to sit in the morning and walk in the afternoon without sweating too much.
However, what you prefer is what you should go with. I like taller boots for the support to the lower back (I walk a lot). Rubber bottoms with a leather laceable upper is about perfect.
Be careful of full rubber boots as they tend to not breath at all and will cause you to sweat more. Your feet need to be able to breath.
The best thing to do is go to the local sporting goods store and try on several pairs, walk around in them and see how heavy they are versus how heavy the insulation is.