Since file organizer trays are only meant to hold small amounts of paper, there should not be much issues in terms of quality. Possibly, if you get a cheap plastic model, it could maybe crack, or be off-kilter, but otherwise, your choice will be more of matter of appearance. You can choose from wood, metal and plastic models in various colors, and various numbers of trays. Make sure that if you are using legal size files, the tray you get can accommodate them.
Horizontal desktop file organizer trays:
Horizontal desktop file organizer tray pictured: Seville Classics Office Desk Organizer, Mesh 6-Trays
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