Just a thought Emiliano,
Try using an old G5 with a RAM disk. If all you're running is a single output, it should work fine. I have a venue with 2 G5 Cats that are running HD with no problem.
For the cost, you could have G5 2 machines (primary and backup) so long as your volume of content isn't hugh.
Memory on a G5 is cheaper per Gb than Mtron.
SourceChildTODD SCRUTCHFIELD
...if it ain't broke...
gimme 5 and then don't act surprised
This one it's analogue
http://www.lynxstudio.com/product_detail.asp?i=12
LynxTWO-B Two Analog Inputs and Six Analog Outputs