I'm needing to register a domain for a small business, and am wondering which is regarded these days as the better option - a .co.nz address or .nz?

I like the brevity of .nz, but I'm not sure how common this is, as the automatic assumption amongst the general populace is that an NZ company will use .co.nz.

Hence why I'm thinking of registering both (which will also ensure no-one else can get the other domain). If so, which one should I set up as the actual site (versus a redirect from the other)?

It's for a professional services business - that makes it sound like a company offering the oldest occupation in history, so more specifically it's a career advisory/development business.

Thanks for any advice.