I just finished working on the tank last week and today added my new panda cories. Don't worry, tank is already cycled. I have Schultz Aquatic Soil in back with smooth rock gravel on top as it is quite light.
Love pandas! Ive just changed my 75g over to real plants and not sure why but they seem to love it. More active/playful than they were before - they are always on the go - I might have to get me some more!