Wow that's quite the upgrade. I'm sure you fish will love the extra space. You could get some different colored LED
strips from ebay (blue & white). Cheap, lasts a while, and produces little heat. Ecotech vortech pumps are the best, but they are expensive. If you wanted to go that route, a couple MP40s or one MP60 would work. Otherwise getting some more koralias or some tunze powerheads would work.