The Yamaha Aventage RX-A2010 home-theatre receiver is powerful, provides with lots of channels, supports two subwoofer channels and has great video handling. Really, it's difficult to think of any reason not to choose this receiver, aside perhaps from the price tag.
This is a home-theatre receiver in which few compromises have been made with regards to connections. Most companies are dropping S-Video in favour of HDMI. This receiver has seven HDMI inputs on the back panel, plus one on the front for ad-hoc connections, and still has lots of S-Video inputs. Also component video, composite video, analog audio and digital audio. Probably overkill, but if you have a consumer-electronics source device made in the past 20 years, then this receiver will support it (aside from the Euro SCART, which no one supports).
Like connections? Feast your eyes on this panel.
This is a proper 7.2-channel receiver. There are two subwoofer outputs, and these can be set to have the same signal, or separate ones (either left and right, or front and rear).
The two HDMI outputs support 3D content, plus one of them supports the Audio Return Channel.
The auto-calibration wizard guides through the set-up process within a couple of minutes, using the supplied microphone. You have a choice between a single-position measurement, or multiple positions. The unit also applies EQ, but you can switch this off if you prefer.
On the fairly conventional speaker package I used, the system applied sensible settings, including correctly choosing "Small" for the centre channel.
You get lots of options for a second zone (and a third one), including video support. In addition to the bulky main remote control, you get a neat little compact one. This actually permits just about as much control as the main remote, albeit via the menus.
This receiver has not seven, but nine channels of amplification. Each of those has 140 watts of real hi-fi continuous power into eight ohms (two channels running at a time). It's going to be a very difficult speaker system that will give this receiver problems. If it does, preamplifier outputs for all channels allow you to use external power amplifiers.
Yamaha receivers don't support Dolby Pro Logic IIz, which processes sound to extract two front "height" channels. But it comes with a great variety of Yamaha's own DSP modes, some of which generate "Presence" channels, which are much the same thing. So, a full-blown system will have two stereo speakers, a centre channel, two front height speakers, two surround speakers and two rear-surround speakers. Of course, you don't have to connect up all nine channels; there is a lot of flexibility to use some of the channels to drive other zones (eg, stereo in two zones in addition to the main listening room), or to be used for other purposes.