Definitely doesn't need to be wall mounted... I just happened to buy a wall mount a while ago before I really thought about this, and also didn't want a big tv stand and clutter. Now that it's mounted though I'm having second thoughts.
The unit you linked looks decent. I like the stand I found. Had no idea those existed until right now. Allows for some swivel (which I want), and also is very open so should be ok for cooling.