I think the oven at home is too old

I think the oven at home is too old recently, so I need to buy a new one. So I started to study the oven. First of all, I think about the capacity of the oven, because I like to make some cakes by myself, so I want to choose a large capacity oven, and finally choose a 56 litre oven. Second, I want to consider the function of the oven. It is the best choice for me to adjust the temperature through the upper and lower tubes. Finally, I want to consider the oven and then look at the inner liner of the oven. Generally, there are galvanised, aluminised, non stick coating, enamel, enamel is the best, non stick coating is easier to clean, and I chose enamel. This research is to let me choose the best oven for myself according to my needs.