Which amp for B&W 805 D3 and HTM2 D3 speakers - Rotel RMB-1555?


I am setting up a system with L&R of 805D3 and Center of HTM2 D3. My understanding is that just the receiver (plan on getting Onkyo TX-RZ50) will not power these speakers well enough to get the most out of their potential. I am thus considering adding a Rotel RMB-1555 for the LCR. I would maybe consider bi-amping L&R since RMB-1555 is 5 channel. My question is whether the RMB-1555 (120W x 5) is sufficient or would there be a significant improvement in going to RMB-1585 (200W x 5). I do not listen to the music too loud. Just want clarity. Per B&W, the recommended amp for 805 D3 is 50W - 120W into 8Ω on unclipped program.

While you are advising me on RMB 1555 vs 1585 for this set-up, I am open to other options in the price range as well.

Thanks

someet

+1 for what @soix says in the Mid-Fi/ HT realm Yamaha is great gear.

They make a decent Bass to and their dirt bikes are a hoot.

I was originally thinking of Denon. Got tilted towards onkyo TX-RZ50 because of DIRAC Live.

I’ve owned an Onkyo HT receiver since 2008. It is great and still going strong. I understand Onkyo (and other players) were getting bum HDMI boards from the same factory resulting in the black mark on quality. Also heard this problem was resolved.

The retail on the Onkyo TX-RZ50 is $1400.  Other receivers (Yamaha, Marantz, etc.) are also in the same price range.  You are better off stretching your budget and going for a used Anthem AVM-60 processor in the $1900-2200 range.  Much better power supplies and analog stages, especially if you are going to use an external amplifier such as the Rotel. 

Don't bother wasting money on a receiver.  The power supplies and audio stages are nearly as good as a dedicated processor.