The fact that you said " it doesnt matter what the room size is " really proves you are not even qualified.. Speakers are all rated to room size, as they generate sound waves, and unless you are talking about high frequencies generated by a tactrix Horn, which wouldnt be affected by room interaction via furnishings etc, bass drivers are... The bass extension of a 12 inch driver would cancel itself out if it was placed in a room that was 3 metres long. It would need 6 to 8 metres to extend properly.. So stop talking BS kiddo, I've bought my fair share of High End Audio gear over the years when we had much larger living space to fully appreciate it.
The guy is looking for discrete sized HT gear, if he had a large room, he'd be looking at gear that would suit. So I can make the assumpton, that most people here dont have a lounge that is 60m2.... 20m2 is going to be about the max, on average