Possible new washers, and dryer
If you're looking for Lois cost and best reliability and repair ability of basic whirlpool dryer with lint filter on top is your best bet for a dryer, and a front loading washer, I would not buy any top loading washer available today, they just use too much energy. Don't spin the clothing that dry And they're too hard on your clothing.
You said you were considering the new heat pump GE combination washer dryer, that's a good deal more costly on the initial price but a lot cheaper to operate, the heat pump dryer would cost less than half as much as running an electric dryer and of course the front loading washer would use less than a third the water your Maytag uses so the savings would be considerable in water and heating of water, etc.
The GE combination has been out for two years now I'm not aware of any problems with it. I think of the three full size combinations available right now. It's the best choice, the LG and Samsung Companies also have full-size combinations.
The main advantage of the combination is that it goes automatically into the drying mode and finishes the whole job. It also uses far less energy than any conventional dryer. You also don't have to worry about an outside vent and in a cold climate, you're not sucking a lot of heat out of your house in the winter when you're running a dryer.
How many loads a week do you launder ?
John