We get asked this question a lot, and there are several factors to take into consideration when answering it. The biggest question to answer is whether or not you are planning on selling the house in the near future. If you are planning on selling then most real estate agents will tell you matching appliances can help to sell the home quicker. It gives the kitchen a finished look and ensures all the handles and stainless finish are matching.
If you are not planning on selling the home, and matching handles isn’t a concern for you then do whatever YOU will be happy with. Find the features that are important to you in each individual piece and run with it. Most people will never even notice... unless you have an appliance sales person at your house, in which case you will be silently judged.