Tank looks great
I would transfer fish over as soon as you have FX5, Air pump, Heaters sorted.
Most of your good bacteris etc will already be in your FX5, so you should be good to go.
Just maybe get temp of new tank water similar to where they have come from, if going to pop them straight in
Could possible check Ph levels to make sure they're similar as well but personaly I wouldn't worry to much about it.
Good Luck.