King Wah, Paihia, NZ.
My experiences with buffets have left me at the point where I'd rather spend $20 (breakfast) to up to $100'ish for brunch/lunch dinner at a hotel once in a blue moon than $15 on the regular. Not many good options in the more "regular" price ranges, barring a few Japanese/sushi buffets.
King Wah is an exception. Beautiful fresh oysters, authentic-Hong Kong quality BBQ: char siu/pork, pork belly, and Canto fried chicken among other things. NZ$25. Toss in northern style potstick jiaozi dumplings, spring rolls, a decent fried rice, soup, salad bar, other meats/seafood etc etc etc and it's miles ahead of the usual "deep fried in artificially coloured corn-starch sauce" that passes for Chinese.