Welcome to the site. I keep angels too and I love them! I am sure yours will be thrilled to get into a bigger tank.
Just a note, you should ask people on here for stocking suggestions. there are people who have kept all the species you are talking about and can give you good info on them. I will give you a heads up and say that a common pleco and balas need a much bigger tank than 55 gallons.
Two roads diverged in a yellow wood, but thankfully they both led to fish stores.