It is your pool and certainly your decision but 1-1/2 hp is too big for this small of a pool. It isn't energy efficient and just overkill. I think you would find here on our forum that most of our pump experts would agree that you don't need that big of a pump. On pool pumps, it is definitely not a case of bigger is better. Like I mentioned, my pool is the same size as yours and 1/2 hp has been just fine. At any rate, it is your decision. Just offering an opinion for you.