Should I sell or rent my townhome?

I have just recently married. Both my husband and I have townhomes. His is larger than mine so I will be moving in with him. We are currently trying to decide if I should rent or sell my townhome. We want to move into a single family in another year so if I sold mine, we were going to put that money towards a new home. However, some people have told me that renting would be a good idea as well. Now I am just confused. Any suggestions?