I'd agree that your room characteristics/placement might be at play -- I use the RX1 with a 3390 and am pretty happy with them. While I'd describe the speakers as forward, I wouldn't exactly say that they're bright. Perhaps, though, you...
I've listened to the HW-F750 pretty extensively via both optical and Bluetooth from my phone. I'd say one of the pluses of this soundbar is that it can fill a large space better than most soundbars, probably due to the multi driver...
