as a fridge repair guy for a major store, you will be lucky to get the modern crap to last more than 2 to 3 years, build it in and with heat build up even less fridges are meant to be well ventilated what ever brand you buy,with the new style gases and weak low consumption compressors, the better the rating the warmer the inside of the fridge, in other words they dont use any electricity but they dont keep your food fresh cos they aint cold, i get to go to a house every day with someone saying why does my milk go off, and i reply cos it aont using any electriity
as for the best brand rubbish, most makes are just cheap crap with a expensive badge on, today called to a 1300 quid fridge with a burnt out light switch it was just a 250 quid model with a fancy name on it
buy relitively cheep and get a good 5 year warranty and not one of the free warranty with appliances, a good after care warranty
and avoid frost free freezers there has never been one sold that works yet