The HD621 on steroids would have to be a processor as well since no Blu-ray player (yet) can decode Atmos to 9.1 or 11.1 PCM.

G61R, HD621, DSP5200 (4 - mains & surrounds), DSP5200HC (center), SW1600 (2 in L/R configuration), JVC DLA-x75r 3D projector, Stewart Firehawk 106" screen, Oppo BDP-103, Verizon Fios HD DVR, Xbox 360 Elite