Here's your solution! These converters do HD-ready output on HDMI including Audio. They have been successfully tested by us. For 16,99 including shipping they are the perfect solution for now! This does not mean we won't be looking into native 1080p50 in the future, but right now we got other priorities (again: cases, keyboards, pcbs...).
Here you go:
http://www.ebay.de/itm/301551649464
http://www.ebay.de/itm/181822086245
http://www.ebay.de/itm/231631752655
best
Deft