Following on from the TXSR508, the TXSR578 offers video processing via Faroudja DCDi. In addition to improving the pass-through video quality, this gives the ability to upscale signals to 1080p. Added to that is HDMI Upconversion.
What this means is that whatever you plug in to the TXSR578 will be converted in to 1080p HDMI - whether component or composite.
This not only gives the highest resolution possible from all your sources but also the possibility of using just one HDMI connection between your AV receiver and TV.
The Onkyo TX-SR578 offers a highly competitive, four, 3D TV compatible HDMI inputs - many of its rivals still only offer the older non-3D compatible HDMI v1.3 sockets.
Added to this excellent HDMI count you'll also find twin optical and twin coaxial digital inputs and the full complement of component, composite and RCA phono sockets that you'd expect.
In addition to a front-mounted mini-jack for easy connection of any portable with a headphone output, the TXSR578 features a universal port at the back for Onkyo iPod dock connection or DAB+ tuner upgrade module.
Finally, a second zone output that's either active (powered) or passive (requires powered speakers) gives the option of spreading the sound into another room. In short, given its cost, we still don't think you'll find a better connected AV receiver from another brand!
Youc an get the TSXR578 at Richersounds for £350 (opens in new tab).