This is my setup for my A. bitaeniata, was the closest looking I could make it to the amazon river (from the video I saw of it) and they seem to like swimming through all the driftwood and java moss.
http://www.fnzas.org.nz/fishroom/a-bitaeniata-biotope-kinda-vt17491.html
For breeding I would suggest a 60x30x30cm tank, but you can go smaller for a pair. Apisto's are not monogomous fish and the male will sleep around (he has a harem) so you can have multiple females spawning at once in the same tank (given they have enough space, apisto's can get very nasty and kill eachother). For your decor you should have some sort of dividers for the tank so the females can't see eachother when spawning. Plants are appreciated, as well as a fine gravel (they are eartheaters so like to sift through the gravel for food).
If you want to go even furthur, you could put peat in the tank; either in a stocking and dropped into the tank, or you could boil some up, let it settle, the pour the water into the tank. The peat will naturally lower the pH and soften the water, also gives it the water a tea coloured tinge (looks nice and natural).
Oh, and lastly congrats on the purchases, apisto's are awesome 8)