I would "ditto" everything Steeldrifter said--I'm a Michigan guy, too -- my cold water set-up is exactly what he described, and it works very well for me. A few additional considerations: 1) thin "liner" socks made of silk or a moisture-wicking synthetic under your thick socks will help to keep your feet a little warmer by wicking the moisture away from the skin. It's not a magic bullet, but it makes a noticeable difference to me. 2) Make sure the wading boots that you use with your new waders are roomy enough to accommodate your feet in thick socks and the neoprene booties attached to the waders without being too tight. In my experience, tight = cold. 3) I haven't used them myself, but the little chemical warming packs you can get to slip inside your socks supposedly do a really good job. My son used to use them in his riding boots when he rode horses in the dead of winter and he said they worked well. I'm going to try some this year myself.
Once upon a time, you could get boot-foot breathable waders, which would theoretically keep your feet a little warmer than stocking-foots, but I don't know if they even make them anymore.
I will also add my voice to the chorus of those telling you how much you're going to love the breathable waders--neoprene simply can't compare.