TRy which, or possibly a more pragmatic approach which has generally worked for us- buy the cheapest one from a seller with excellent customer service and decent standard guarentee,
Washing machines dishwasher etc we have had the cheapest from John Lewis over the last 5yrs or so. THese things aren't designed to last for ever, and as busy working parents if a repair is going to be difficult I'm afraid we now don't bother much and replace. As of yet (touch wood) all OK- WM 3yrs old, dishwasher older, dryer 6yrs (and sounding a bit clanky! so wearing out).
JL delivery has been good and efficient too - again it costs me money (or a days holiday) to not be at work if the delivery can't be fitted to my schedule, so and extra £10-20 on the machine price isn't un reasonable (but tumble dryers etc we just stick in the car- WM way to heavy!)