Soundcard advice

Soundcard advice

Hello I am looking to buy a new soundcard, I have seen the video “Dj Soundcards for Less Than $200”

And I am thinking on buying a m-audio fast track or the PRO version.
I like to us it for my headphone, monitor and my guitar.

some backgound
At the moment I am making mashups (via Ableton) and I just discovered how to perform with the VCI-100SE
And I’m thinking about to extended with the APC40

The m-audio fast track PRO seems to have overcapacity for my.
I like to know if there is a different in sound quality between the both.
And what advantage do I have with a soundcard with a mixer, keyboard and compressor input.

Do I need the mixer output if I will have future plans for Traktor/Serato scratch or is it all USB?