I like paddock more than whiting, for the same price, it has more of a neutral, less fishy taste. It is also easier to bake (flakes better). With whiting, I have found grilling it on the Foreman...
I asked the same question, because I saw that episode of Good Eats too. Evidently, all you have to do is weigh the curd and the liquid that drains off, then look up the values for curd and whey.
You've got pretty much everything right. Your carb load may be a bit much, especially if you are only working each bodypart once a week like you hinted at. But of course, see what you can get away...