Reply to MIDI Controller under $600

Hi guys, I have some experience with CDJ's but now I want to buy one MIDI Controller, I have $600 to spend. These are my options after watch and read some reviews in internet. The order is my interest at now:

1 - Denon MC3000 - $499
2 - Denon MC6000 (used) - $???
3 - Reloop Terminal Mixer 4 - $600
4 - Numark iDJ Pro iPad - $500
5 - Numark N4 - $420
6 - Traktor Kontrol S2 - $500
7 - Vestax VCI-300 MK2 - $500
8 - American Audio VMS4.1 - $500
9 - Pioneer DDJ Ergo - $500
10 - Stanton SCS4.DJ - $500


Opinions and pro's / con's of every controller please!