I by no means claim to be an expert in what tools are the best for cooking and stuff, but there are a few I have that I love-- like a spring-form pan and a good set of bread pans-- and a few I know I would love.
A Kitchenaid stand mixer
A stainless steel frying pan with a copper bottom (for more even heat distribution), like this one here
A pizelle iron (pizelles are pretty Italian waffle cookies) sort of like this one
A French rolling pin like this one
The only thing is something about the mixer-- will I get lazy from the easiness of mixing things?