No pro, but...
Cast iron is great for frying but as you have probably figured out by now you don't want to be making acidic sauces in it (unless enamelled). That's where those bonded stainless pans come in.
Cast iron (ie, Lodge) woks are a bit silly - the point of a wok is that it doesn't hold heat too much, whereas cast iron tends to be super thick so does. Problem is I am not sure you'll find a thin one suitable for induction, so your choices may be limited there. This is basically my only gripe with induction.
Personally wouldn't bother with the griddle, especially as you already have a ribbed pan, but presumably you are particularly attracted to it which is entirely understandable :p
I like having a tiny pan (5" or so) for toasting small amounts of nuts etc. Cast iron, alloy/stainless, or blue steel, does not matter (as long as it works on your stove). I got an okay one from Briscoes for like $25.
pm me if you want to try some sourdough in that casserole, I have a vague set of instructions that are not really that much more work than Bittman's no-knead bread.
edit: also a razor blade threaded onto a chopstick makes a great lame for slashing the top of bread :p