I work in Manukau.
What Clounge is saying, is people deal with people, not with companies. If you have a bad experience somewhere, you are hesitant to go back. If I go somewhere, and am ignored, I won't go back. I know Clounge, and I know the company he owns, and the service is the best in the country, they are the best for one reason, SERVICE. They are not always the cheapest, but they are at least reasonable, but the people they employ, and the service they give are the best in NZ. Service is what matters, If you go somewhere, and are made to feel like you shouldn't be there, you won't go back, but if you greeted, and asked if you need a hand (esp if your waiting at the counter) you will go back.
As far as range goes, My local animates has/can get, most of what I need for my tropicals, granted they don't do marine, but yeah they are more expensive most of the time.