yeah its a painful decision… i mean i have been going throu the same…and the more you look the harder it gets.. there should be a forum telling you what ure best options are with certain budgets. its abit like digital music…the industry is swamped with controllers now… my advice is to go for a controller that has been making dj equipment for 15-20 years..they have the knowledge and they make controllers that last. the S4 is going to be out of date when traktor pro 3 comes out… which is probably soon cau they have drop t2 down to $79
if you want an answer then you need to know what you want… do u want a completely midi controller or do you want to be able to hook up cdjs turntables