Brakes are brakes and performance is what you are looking for, so I would suggest when you want to go down that route a telephone coversation with bigphil or one of our other traders will answer any questions you have.
Wheels on the other hand hav an aesthetic, subjective angle. You need to find a set that you like and then we can give advice on sizes and offsets. I would suggest sticking to wheels that others have fitted to a Zed, either here or in the States, as no one will be able to guarantee there won't be fitment issues, clearance problems or that offsets are correct unless they've been fitted to a Zed before.
I'd have a look round the wheels section here, the trader's websites and the US sites like www.350z-tech.com for ideas.