The Yamaha RX-V671 covers the core functionality of an AV receiver well: it sounds great and has plenty of connectivity. Its six HDMI inputs will be enough for nearly every home theater, and one of those inputs is on the front panel, which is great for making a quick connection to a laptop or digital camera. Yamaha is also the only manufacturer that offers a colorful and responsive user interface, although the RX-V671's interface would still be considered archaic on any other home theater device.
Its main failing is the lack of AirPlay support, which we think is the one AV receiver streaming feature worth paying for. If you don't care about AirPlay (or would rather add that functionality by purchasing an Apple TV), the Yamaha RX-V671 is one of the best choices available, sounding better than the competing Onkyo TX-NR609, although the Yamaha does cost almost $100 more.