I'm gonna have to disagree with Mike about not considering replacment of the 30+ year old units. When I disassembled mine to get it out after the dryer quit, I discovered how rusted it was inside. Not only had the belt broken on the dryer, the bearings were on their last legs, too. Yes, I could have kept throwing parts into the old thing, but how many times do I really want to yank it out to get to the back of it to work on it? A belt today, bearings tomorrow, and eventually a motor, and on and on.
My new front loading washing machine is very economical on water, and I get many more wash options than the old Frigidare unit ever offered. There was never a warm water rinse on the old unit. On the new, modern one, I also get a sanitation cycle which was new to me at first. Now that I know how well it cleans towels over the regular cycle, that alone, is reason enough for me to ditch the old OEM machines. I can actually smell the difference. It cleans the stuff you cannot see that a normal wash cycle doesn't get.
The modern dryer dries clothes in very short amount of time - a contributing factor to that, I am sure, is that the new washer spins so vigorously that the clothes are almost dry when I remove them from the washer.
And let's not overlook how much more gentle a front loader is on your clothes than the old "twist" mechanism machines. I've had clothes ripped apart on that center twisting thing. Not any more! FInally, I can get more items in the frontloader than I could in the old top loader, and the new machines still fit in the same space.
It was for these reasons, and more, that when my dryer crapped out on me, and it was just a broken belt for the moment, that I decided to get the old, tired machines off the boat. And when I started the disassembly in doing so, I got a good look at the nitty gritty inside those machines and further confirmed that I had made the right decision not to put any more money in 30 year old appliances.
No regrets on replacing the OEM washer/dryer.