Utp/cat5 your choice

What the common wisdom of vvvv users advices for a reliable utp/cat5 (dvi or vga) converter?

vga is more quick, no multiplexing / demultiplexing of a digital signal.
I have a pair of Kramer converter ( DVI -> 2XCat 5 ) and i m loosing something like 1/2 second on 50 meters.