IFB Elena VX
Hoover OPH 716DF
Whirlpool AWE 8840
Front loading machines are good as you can use the space above and sometimes stack a dryer on top. In general front loading machines use less energy, using less water by only partly filling the drum and obtaining higher spin speeds which clean without requiring as much heat.
With a transparent door you can look inside the machine and see what laundry is inside.
With a door that opens wide it is easier to load or unload the machine without the door becoming an obstacle.
With a larger door it is easier to load or unload the machine especially with something big like a duvet or a winter coat.
A faster spin speed means you can get things cleaner with a lower temperature of water. Using a fast spin also extracts water, meaning that the clothes come out nearly dry. Generally, anything over 1000 rpm is very good.
With a wider range of programs to choose from you can be more specific and choose the best, most economic program for your needs.
More weight capacity helps if you want to wash something heavy like curtains. A traditional household machine can hold around 6kg, so with a machine much bigger you may waste energy using it when only half full.
With a delay start option you can schedule the machine to begin at a later time. You can also set the machine to wash at night if your electricity is cheaper outside of peak times.
A really quick cycle can be a great option if you are in a hurry.
The machine will let you know when it is finished with an alarm or even by playing a tune.