What size discus are you planning to get? if juvies, go bare bottom until they grow out. Also, I would not introduce any fish just yet to avoid QT'ing discus in another tank. How long has your tank been running, is it cycled?
And, welcome to the forums
and hope you enjoy the information here. Congratulations on your deal and giving discus an opportunity! What strain of discus are you looking for? any suppliers in mind? always check reviews before buying. There is a nice sponsor section on these forums where you can browse through reputable suppliers.