If you don't already, check out www.KingArthur.com They make flour, but have to-die-for recipes for all kinds of baked goods. They also sell baking tools.
I'm not a huge baker, but I do think the following things make life a lot easier:
Huge metal bowl (or two of different sizes) to mix larger quantities of dry ingredients.
Good quality cookie sheets and baking pans. I use metal and use parchment paper to line them so that cookies don't burn, etc. King Arthur sells round parchment paper which is divine, because I can never cut it right to put in a circular baking pan.
A nice belgian waffle iron if you guys like waffles.
I use a hand mixer. Again because I'm not super-baker. But that in a large bowl works great for almost everything. Around $30-50.
I also like really good quality measuring spoons and cups. I think Pyrex liquid measuring cups are the best. It's good to have two sets of each because you can measure more without washing out between ingredients.
Good quality cooling racks are nice too.
And finally, the best tip I ever got for cooking anything was to cut and prep and measure everything first, before mixing. So I have a small set of glass bowls that I use to keep measured ingredients separate and ready to mix. I have this set of six from Pampered Chef. They come with lids and are great for many things.
http://www.pamperedchef.com/ordering/prod_details.tpc?prodId=9792&catId=123&parentCatId=123&outletSubCat=