I'm planning to set up a 5.1 home theater system in the living room of my new condo unit but I know nuts about setting up one. I'd like to seek some advice and recommendations from you guys here.

My living room is just about 12ft x 10ft. My couch will be up against the wall and the distance at the sitting position to the TV is probably about 8-9ft. On one side of the living room will be the glass sliding door to the balcony and the other side will be some open space to kitchen and main door entrance. Since my unit is small and it is a high rise unit, I just need an entry level setup will do, although I will consider spending a fraction more if the sound experience is considerably better. I have a budget of around 6-7K.

AVR
I'm pretty much set on Yamaha for AVR, either the RX-V481 or V581. I need the 4K for the TV, just contemplating whether I would want to future proof with Atmos or not.

L/C/R Speakers
I'm leaning towards the Sony CS3 floor standing speakers and CS8 center speakers since they are cheap with decent performance and good value, based on tons of reviews on the web and some of the earlier comments in this thread. Any others that are better with a similar price point? The other one that caught my attention based on reviews is the Elac. Are the Elac F5 or F6 worth the extra over the Sony CS3/5/8?

Sub-woofer
I have no idea on this one. Any recommendations?

Surround Speakers
I have no idea on this one as well. Since my couch is pretty much against the wall, so I'll be placing the surround speakers on the left and right of the couch. Is the Sony CS5 bookshelf speakers good for surround?


Any suggestions and recommendations will be greatly appreciated.

I don't have a good actual photo with full view of my living room. Here's the 3D rendering by my ID and what I have so far of my actual living hall, which should be good enough to give you an idea on the space. Overall, it isn't very spacious and it is a constraint.

3D Rendering



Actual photo with partial view. The edge on the right hand side of the picture is pretty much where the wall is, which my couch will be up against it.