I could use some advice on Le Creuset. I received 2 pieces of Le Creuset as gifts - 5 qt round and a 5 qt oval. Are the two pieces redundant? Will I be happy to have an oval and a round, or should I exchange one for a different size to get some more variety? I probably won't be cooking for more than 4-6 people very often. I am thrilled to have received such nice pieces of cookware that I could not afford to buy myself, and want to make sure I can get the most out of them. Thanks in advance for your help!