Thanks
@fLUX and
@Dwaipayan for your suggestions.
@fLUX do you have any suggestions on DALI? and is there much difference between 3050, 3090C and 3020 vs 3050i, 3090Ci and 3020i. As i'm getting 3000 series at 20 k cheaper on overall package compared to 3000i series.
Option 1: is to setup with QA 3000 or 3000i series
Option 2: Polk ES15/20 as LR and ES30 as centre (might sound better than QA? (not auditioned)) and surrounds with ES10.
In either of the above cases I'll have to go with SUBs (one or two may be but not decided yet on what subs). So, If sub is necessary Do I have to still go with QA Floor standing speakers or Polk ESs whose built quality is better than QA's?
PS: Just googled what are reference levels.. could't understood much. is it about how exactly we hear as the music was made? what is required to listen at reference levels ?