I also agree that the Upper end Marantz units are built well, but I have installed both Marantz and Yamaha units and the upper end Yamaha units do favorably compare with the Marantz units. Budget does factor into a lot of how a product is designed and how it functions, as they say you do get what you pay for. The one thing I found about the Marantz is that they tend to run on the hot side, with that said you do want to ensure any unit you purchase has lots of room in your stand/rack for heat dissipation.
Yamaha CX-A5000, ATI AT 2007 Amp (7X200W), ATI AT 2004 Amp (4X200W)
Klipsch RF 63's - Main, RB 61's - Front heights, RC-62 - Center, RS-62's - Surround, RS-52's - Rear Surround
2 Rythmik DS-1510 DIY Subwoofers (With PEQ600XLR3 Amp) each connected with Antimode 8033S-II