being in the business I would also recommend the combi steam oven as opposed to the regular steam oven. As stated earlier 1.5k will get you a good one.
it should also perform most of the functions you need from a microwave and can also be used for baking, roasting etc.
when roasting it helps retain juices in meats, avoids shrinkage and yet will give you the crisp finish on the outside you expect from a normal oven