The question is more along the lines of...
What do you NEED?
Do you have any equipment already which you are happy with? Do you have a decent A/V receiver already? Or do you NEED an A/V receiver? Do you have any speakers? Or a subwoofer? If you ask for 'anything' that's what you will get.
Also, you should be specific about whether or not floor standing towers work better or bookshelf speakers, or on-wall/in-wall speakers work better for certain locations.
How did you wire for your 'theater' space? Did you wire?
What use do you have for video in the space? What do you watch and on what? How much video will you be watching vs. how much audio you will be listening to?