My husband and I are looking to get an above ground pool. Of course when you go out there is so much information to digest and we would love to make the right decision. We are a family of 4. Kids are ages 9 and almost 13. I think the 27' would be sufficient but my husband is afraid of getting the 27' and wishing we got the 30'. Also we are trying to decide between the steel and resin. My first thought is resin since it lasts longer but I do not want to go in and get the most expensive product out there without researching first. If we got the resin, it would be the 54" walls as where the steel is 52" walls. Any help would be appreciated. Thank so much.