Reply to Mixer/controller thoughts and input requested

Currently do mainly mobile gigs. Parties, wedding etc. I need to upgrade my mixer or add a controller, here is where I was hoping for some input, thoughts and suggestions.

I run two laptops for each gig. Both carry the exact same music on them. No CDJ's, do hook the iPhone up every once in a while when I need to download something or stream it.

Laptop 1 I use for cocktails, dinner music etc. I use OTSAV, so no midi, no fancy tricks etc. It runs song to song, like clockwork. I know Traktor has 'cruise' mode, but it just isn't as simple and sure proof. Laptop 2 runs traktor. I use it during the 'party' time of the evening s for 80% of what I do. I use internal mixing, using keyboard shortcuts of the mouse.

I have been torn between upgrading to a new and better mixer, or moving over to a controller. I had an S4 for a couple of weeks, but hated the mic and the auxillary input for the second computer.

Anybody have any thoughts? Current throw around items were:

NI Kontrol Z2
Behringer Nox606
Denon x1600


Very different mixers, I know.