I would be concerned with your lack of previous experience keeping discus.
They are not all that hard but like everything else, "The Devil is in the details."
I know from personal experience that Geophagus jurupari and G. surinamensis happen to work with Discus very well. I had wild adult Royal Blue and Heckel Discus with some medium sized Geo's in a 125 gal six ft tank. I kept most of the major plants in pots to provide added protwction from the sand sifting Geo's and to provide spawning sites for the discus.
Perhaps it would be best to buy the discus as a group of 8 or 10, 2 inch fish and raise them in the tank using the bare bottom approach. After six or eight months the discus should be four or fiver inches. By then you will understand discus keeping well enough to proceed.
This is when I would add the Geo's and some substrate. You will find keeping both together is easier if the substrate is kept to only about 1 inches deep and is made up of #8 sand. This is a medium size sand grain. Small enough to easily sift and open structured enough to keep aerated and the Geo's are most helpful in this regard.
I recommend potting the large plants and providing some floating watersprite or Ceratophyllum. Discus appreciate some overhead cover. Some bogwood and a few large rocks are always nice to include in the decor. Always leave plenty of open spaces.
This is a type of display many Discus keeper are not aware is not only possible but extremely beautiful. Ignore any of those "experienced" discus keepers who will tell you what a bad idea this is. They have simply never tried it before because it takes thinking outside the standard discus model "box."
Here are a few photos of a ordinary wild Manacapuru Blue, an average wild green and the rest are half grown Domestic "Fire Dragons." I just bought them, did not name the "dragons" but maybe the photos will encourage your discus venture.
Larry W.
