Home Theater cabinet / speaker placement

[Deadset]

I'm finishing my basement and have a nice big TV wall laid out, approx 16'. All the speaker wires etc, will be in the walls.

So, I went the thx.com to look at speaker placement and it suggests if you only have one sub, which I do, to place it in the center of the room on the TV wall.

My question is, is there a cabinet for shelving that is robust enough not to rattle with a sub right under the TV? Does anyone have any good recommendations for purchasing a cabinet? I'd like one with a dedicated hole for the center channel. Post pics if you have them and where you bought it.

I'd rather not build one, but if I have to, to get what I want, then I will.

Thanks.