Reply to DJ Controller, I should choose 1 of the Controllers, help please.

Hi guys, nowadays i'm looking for a DJ Controller.. I should choose one and go&buy..

I believe the best controllers are;

- Pioneer DDJ-T1
- Numark Mixdeck
- Denon DN-MC6000
- Traktor Kontrol S4

Numark MixDeck

I quite like Numark Mixdeck and I want it more than others because; the advantages are that you can use CD's/USB Flashdisk/PC/HDD, also it has LED Screen on it.. But I heard that the crossfader doesn't work correctly, is it true? are there any f.w. updates for fixing it ?