Room Conditioning

Hi:
I Know very little aboout stero and I need some help.
I have a basement sized (WxLxH) 5.2 x 11.4 x 2.26 m (15 x 34 x 7 ft)And I want to make a cinema and listening room in there.
The floor and walls are to be finished (they are row concrete at this moment), I would like some suggestions on what to do with flooring, walls, ceiling, etcetera.
Equipment is:
TT Pilips 775 (shortly a clearaudio master solution)
CD Meridian G08
Pre YBA 2
Ampli Nap 250
Loudspeakers Jmlab Diva Utopia

I would also appreciate ideas on where to place the equipment (I thought about making a kind of platform of solid concrete of solid MDF (glued boards)and just place everything there in a row along the front wall, space is not a problem :-).

Thank you