If your intent is to sell in "A FEW YEARS' it will not matter one bit what appliances you install. If they are not less than a year old at time of sale, they have NO influence on value.
What a homeowner should do who is thinking of selling 'IN A FEW YEARS' is to make the improvements THEY will enjoy for THEIR benefit....PERIOD. That will be the only ROI they may receive.
Your focus needs to be converting an obsolete space into contemporary space. If you fail in this conversion you will find your investment wasted when you sell 'in a few years.'
Now, relax, make the improvement you and those important to you can enjoy and celebrate. You have no control over what happens in A FEW YEARS OR MORE IF EVER.