A very interesting question. Of course, I wouldn't call a kitchen perfect unless it had a professional gas range, and a professional oven. As for other stuff, a big kitchen, with lots of work areas is of course important, but when it comes to other equipment, more expensive isn't always better.
I do believe that everyone needs a good set of knives, a decent butcher's block, and a good set of pots and pans, but when it comes to a lot of the other kitchen accessories (especially the expensive ones) a lot of them are massive uni-taskers, and uni-taskers by and large are evil.
Unless I have like twelve mangoes a day, why would I need a mango corer? A good knife can do that job perfectly.
