Why are you buying another 1100? Regardless of the price you’re throwing away money. Plus you’re buying a controller that will restrict you to buying older APs. I”d recommend consolidating your old APs and current ZD in part of your space and buying new APs and a 1200 for the other part. If your AP count doesn’t exceed 25 and you have fewer than 512 users, forget the 1200 and just buy Unleashed.