Coarse filter pads
Fine filter pads
Felt 50 and 100 micron filter pads
Fluval Biomax (Seachem Matrix is fine. I would buy whichever was cheaper per ounce at the time)
Bioballs with foam inserts in center
Prefilter ceramic rings (after the coarse filter)
Currently for Fluval 206 (in order), course foam, Bio-foam, Carbon, Fine filter water polishing pad, SeaChem Purigen. I've been trying Fluval Clearmax, recently in place of the Perigen, to control high nitrates levels. I don't have a verdict on wither its better that Purigen right now, but by the end of the month I should have some results.
I don't bother with a bio-media, as the tank itself is home of the bulk of the bacteria.
I use two layers of filter pad cut to size, topped with non treated pillow stuffing, then ceramic cubes again topped with pillow stuffing. I find no need for big name products, seems a waste of money, occasionally when my tannins get too dark, I'll use puregen for a week.