I am in the planning stages of installing a pool in my backyard. I'm either looking at doing an oval aboveground 16x32 or a rectangular onground pool made by Aquastar pools. The location of the pool will be on a downward slope from my exisiting patio. I plan to install a deck right off my patio, with a few steps down to the pool deck. I will probably need a retaining wall on the high side of the hill and build the pool into the hill. Any tips or suggestions in choosing the aboveground or the onground? Thank you