i know there are some pretty plugged in people on this site - i'm wondering does anyone have any info on whether this uses high resolution signals or not?

i'm trying to decide whether to keep my VCI300, buy a decent soundcard and use it with traktor, or to just sell it and buy a DX. given that the VFX-1 is going to cost £200 and a firebox or audio 4 is going to be £150 on top of that, the price difference isn't as big as it looks.....