The answer will depend on your type of adventuring. Do you take extended trips that require longer than 48hrs of cooling more than you take trips with more technical trails? If so, get the fridge. If not, get the suspension.
Man kind has existed for centuries without refrigeration. (My lakes and rivers are cold anyways) I want to delete the fridge and solar from my next camper build. I still prefer an ice filled cheap cooler, If I'm going for luxury.