I am currently replacing an old Hayward aqualogic control center. I have been leaning toward the pentair intellicenter and intelliflo pump. I currently have a 14 year old 244t sand filter. As part of my research, I read to get the three year warranty, you need to get a filter, pump, and 1 other qualified item. Would you recommend replacing the sand filter? If so, what would you recommend replacing it with? Pool is around 28500 gallons, with a spa overflow.