Floor stander or not is not an issue.

In some high end Amp or pre-amp, EACH channel, from centre, front to surrounds, comes with Individual Subwoofer output, meaning 5 or 7 channels with 5 or 7 Subwoofer outputs.

The limiting factor here is $.

Your setup looks like inside your room. So I assume you will be mostly the only user of the set up right?

Actually I suggest you get rid of the small desktop LCD, and placed the wall mount LCD with adjustable wall support.
Connect the CPU to the Wallmount LCD. So use only one display. Whenever u want to use computer, just tilt ur LCD towards u, or else turn it around if u want to use sofa to watch it.

Then think of a way to move your table away. If you are using wallmount LCD, you can afford to be sitting a small distance away from the display. Once the table can be shifted, u can move your Hifi rack to the centre.

Finally you can free up your front speakers away from the side wall a little bit.