A question for HT in basement

[Rebel6666]

HI all, I would like to say thanks to all the members in advance for trying to help me.

Within a month I will be finishing my basement home, I'm making a room espacially for my HT. Here is more information:

Dimensions 14.2 * 14.2 square room is a 10 feet high.

I'm going to buy when my room is done a Panny 4000 projector
I have a AV Pionneer 9130 THXK that will be pushing my Energy C-series set.

Front: 2 C-500
Center: 1 C-100
Sub: S10.3
Surround : 4 C-100.

Now my questions is: Do I really need to build a fake floor? My friend is saying that I should because I won't feel the vibrations. I was going to have laminted wood as a floor directly on the cement.

Now I ask this cause I don't want to pay 600$ more for somthing that isn't really important for me. If I can feel the vibration a bit that would be enough for me. If I compare with my friends HT I feel like he as too much vibrations and feels like the sound ain't that good because of it.

What would you guy's suggest to a guy you is really confused on what is the best thing to do.