Reply to Pioneer DDJ SX and Traktor

So, I bought the S4. I'm OK with it. I've run into a problem and I'm sure I'll solve it, but ultimately, I don't love the S4. After watching videos and playing on Pioneer gear, I'd rather have the DDJ SX. I love Traktor. I don't want Serato. I want hardware that works well with Traktor. How good is the Viper mapping? I don't scratch. I also don't beatgrid. I'll use tempo sync, but don't rely on the grid. I've read a lot about it, but I'd like some concise opinions. Does the Viper mapping work well enough to ditch the S4 and buy the DDJ SX?



*disclaimer*
I'd get the NS7ii over anything, but I'm not going to drop $1500 on a controller. That's insane.