Not to make your decision harder, and I realize it would cost more, but I/we always recommend a RadianceXS-3D (or a RadianceXE-3D), over the RadianceMini-3D, to avoid having to send video through an AVR. This is because an AVR can (and often does) cause issues with the video. These come in the form of video artifacts, reduced bandwidth, or additional video delay, and often happen even if the AVR is placed in "pass through mode."
Of course not all AVR's have these issues, but even AVR's that do not will still add an additional HDMI connection to the video path and will cause additional switching delay on an input resolution changes (such as occur when a Bluray goes from the title screen,often 1080p60, to the actual movie which is typically at 1080p24) since there is an extra HDMI re-aquire in the path due to the resolution change. Also, input switching times will likely go up as well due the this extra HDMI re-aquire when the new input is selected.
By using a RadianceXS-3D (or XE-3D), the Radiance does the audio and video switching eliminating the chance for an AVR to damage the video, and reducing switching, and resolution change, times. It is important to note that the RadianceMini-3D processing is the same as the XS and XE, so it will provide the same quality and calibration if you do not have issues caused by passing through an AVR. So choosing the RadianceMini-3D is still an excellent choice. Just be careful of AVR issues -- even if they claim to have wonderful video processing.
I understand you might be skeptical my recommendation for the XS or XE over the Mini since it is coming from the manufacturer. Perhaps someone who purchased the RadianceXS-3D (or XE) for its switching and dual HDMI output could could comment on whether you think it was worth the extra money so as to allow the Radiance to act as the switching hub.
Feel free to call us at 503-574-2211 (or email support at Lumagen) if you want to discuss options before contacting your dealer to make the purchase. If you already pulled the trigger on the RadianceMini purchase, and want to switch to a RadianceXS, you can contact us, and we would be happy to work with you.