I have lived with this AV receiver for about 2 years now and it does everything I ask of it.
The build quality of Onkyo products is high and when you try to lift this beast you appreciate the quality.
This AV receiver has an HDMI switch which is handy, note this is a pass-through only but handy when you try and connect all those inputs.
The power of this amp shakes my apartment despite the fact I only have small satellite speakers and a dedicated amp.
The best feature of this amp by far is the Audyssey 2EQ feature. Onkyo provide you with a little microphone that you use to setup up the AV receiver. The fact that the receiver actually auto configures all the speakers and sub is brilliant. It allows you to setup multiple sitting locations and balances all the speakers so the sound hits you at the same time.
People have complained that this amp is ugly but I have it in black and to be honest it's quite un-intrusive.
The amp works well with my all-in-one Logitech harmony remote.
The only downside of the amp is that it doesn't deal with the HD sound formats. This means it will not decode the HD sound from a bluray player; but if the player can decode and pass it over analogue cables to the amp, this is a workaround.
For the money this is available for now, it is a cheap entry level amp for people interested in home cinema.
To best appreciate the versatility of the TX-SR505, think of the home entertainment components that define today's consumer electronics landscape. It's a formidable selection, with HD-ready displays (from the first generation to the latest 1080p models), DVD players (including the latest Blu-ray and HD DVD players), gaming consoles (such as the Xbox and PlayStation 3), set-top boxes (consider PVRs offering HD transmissions) and MP3 players (specifically the dominant iPod). With the TX-SR505's HDMI transport enabling pass-thru sources up to 1080p and component video supporting 720p and 1080i sources, this A/V receiver is a fine investment for those who want the best of what's available today... and tomorrow. Also, with the ability to tune the TX-SR505 to your room's surroundings through Audyssey 2EQ, you're looking at a seriously capable entertainment control center, without the excessive price tag.