I think the more appropriate question is, "will this receiver satisfy me?"
. It depends on the performance level that you want from your HT. Even a so-so HTiB can satisfy a user who just wants better sound from a TV set.
does a receiver upgrade have a dramatic difference? is my current setup satisfy a 20sq meter room?
Oh YES, but skip the same level receivers and try to go for the mid level receivers (30k up). . IMO, they start to sound dramatically better starting at that price point. Buying a different brand but same level receiver might be a "side"grade instead of an "up"grade
.
I once had a Yamaha 450, then 650 (sidegrade), then a mid level Harman 630, then tried power amps too. The differences were DRAMATIC indeed, specially in the details and mid range.
hmmm... im thinking of upgrading to a louder receiver, my current setup is a yamaha rx-v440, connected to a pioneer floorstander and component book shelf speaker as front, JPW Center speaker and 2 pioneer surrounds and a custom made subwoofer, a simple setup for a 20sq meter room.
The improvement does not lie in the "loudness" but in the
quality of the sound you hear in your HT. Also the effortlessness of the receiver in powering your speakers vs room size. In this hobby, the more the merrier, excess is your friend...
But like I said in the first paragraph, it all depends on how much you expect from your HT.