I'd say in a cake pan collection, you would need a variety of round tins, square tins, rectangle tins and maybe a loaf tin, a cupcake pan wouldn't hurt either, I don't bother with novelty pans, normally they are just used once and never again, unless you're always making a castle cake!
little round tins are good to have, 5 inchs, the pans I have are like, a ickle 5 inch
, an 8 inch, a 9 inch but if you're going to make wedding cakes, you would need the 3 tier pans a big one for the bottom, a middle and a little top one. I have two of each size aswell to make layered cakes.
I'm from the uk, so I get my pans from different sources, not like wilton in the us, non- stick are the best, I got a 5 inch nonstick pan for £1!!! in poundland and its one of the best pans I have!!
Have a nosy at wilton,
hope this helps.