If you could only have one luxury appliance...
and the rest would have to be middle of the range brands... which would you choose to be your luxury item?
No question about it: an induction cooktop.
A top-of-the-line refrigerator is going to function pretty much the same as a middle of the range refrigerator.
A top-of-the-line oven is going to function pretty much the same as a middle of the range oven.
A top-of-the-line kitchen hood is going to function pretty much the same as a middle of the range cooking hood.
An induction cooktop will outperform any resistive electric or gas cooktop, will consume less energy, will heat up the kitchen less, and allow me to do things that I could not do with gas or resistive electric.
Second choice: a Miele, instead of any other brand, dishwasher.
Julabo ME-39 circulating water bath or a Heidolph VV Micro Evaporator, but if you wanted to limit things to "standard" equipment, I'm with Politeness on the induction cooktop.
I'd go further on the Miele dishwasher and say go with the LaPerla unit.
That's exactly what my situation was when I designed and renovated my kitchen 2 years ago. I got a Wolf dual fuel range (36") and good KitchenAid for the rest.
...except for the hood. I had a design problem that dictated that I find something very minimal hanging in space by itself across an important visual plane. I got a top of the line Miele. But it stands to reason that a great cooktop needs a high-effeiciency exhaust system. If it's gorgeous in the bargain that can't be too bad...
Love love love my 48' Wolf 6 burner with griddle double oven..
Can't imagine life without my baby..
When you have a big ass stove, you need a big ass kitchen hood to go with it, so that goes hand in hand.
I am jonesing for a Sub-Zero fridge with the glass door but its more for show.
I see that there are some great deals for high end kitchen appliances.
swl123: "I'll spend some dough on induction it sounds like. What are your favorites?"
It really depends on what floats your boat. Once you get beyond not-Viking, the choices are pretty much all good. (Viking may or may not have solved its problems by now; are you willing to be the test subject to see whether it has succeeded yet?)
For style and controls, the Siemens and Thermador, both just upscale Bosch units, are kind of cool -- but functionally add nothing that you cannot get in the base Bosch. (If you groove on styling, however, that may be significant.)
For installation flexibility, it is hard to beat LG. The LG '30845 model is (figuratively) paper-thin, and (actually) less than 2 inches or 5 cm thick. You get a lot of space freed under the counter with an LG. The opposite extreme is Electrolux, which consumes a lot of room under the top of the counter.
Nobody ever went wrong getting a Miele appliance. The Miele induction cooktop has probably the highest wattage burner available in an induction cooktop. But, honestly, you probably do not need that kind of wattage in an induction burner.
Yes you do. When you've got that Vollrath 24 qt stockpot and 73 chicken carcasses, you want all the wattage possible to make stock-making as efficient as possible. The only thing that the Miele can't do is flush-mount to the counter.
But 5 element is great. If the OP is running short on counterspace, then a 4-element unit could do.
I agree with the other posters who said an induction cooktop. All of the other appliances in your list just sit there and do their thing with minimal supervision. The cooktop, on the other hand, is the appliance that you really use and interact with while you are cooking. You spend a lot more time standing in front of your cooktop than standing in front of your refrigerator.
Assuming luxury means better, then among the four choices you list, I definitely pick cooking hobs as my focus.
If luxury simply means better looking, then I will want a luxury refrigator.
Dishwasher, hands down. Doesn't even need to be super high end, just good enough to throw in dirty dishes and pots with minimal scraping and have them come out sparkling clean. Our stainless-interior KitchenAid will do that.