Reply to Current Controller: Kontrol S2. Looking to upgrade?

Hey guys so I'm new to the community and have done lots of searching and reading to compare as many controllers as possible before posting this, but in the end it seems that my questions and situation are rather specific to my needs.

First and foremost, I am only a recreational DJ and pretty much just play for friends at home, maybe a house party, and am looking to move into doing a little side work at some very small local bars but nothing crazy. It's just a hobby for now and not looking to go 1000% professional with this. Not that it couldn't happen down the road, but it doesn't fit into my needs at the moment.

So that being said, I went from toying around on a Hercules MK4 controller to having some cash to spend and went with the NI Kontrol S2 package after having a nice experience playing with a friend's S4. Felt I didn't really want to spend upwards of $1000 and since I don't normally mess with more than 2 decks at once, the S2 fit the bill. I am working currently on exploring how to incorporate the sample deck features, but am not sure yet if they are what I truly want, or if I want to upgrade to a true 4 deck controller like the S4 just to have that added flexibility, even if I only use it sparingly.

With that in mind, I started looking into controllers the next level up from the S2. Obviously first in line was the consideration of the S4, but after extensive reading on here, it seemed that really the S2 could do pretty much everything the S4 could do once some new mapping was done. Yes, not EXACTLY the same as the S4, but for a non-professional, selling the S2 and adding quite a bit of cash for very minor differences just kind of seemed like a waste.

That's when I came back on here and started toying with the idea of straying from NI. There's the VCI-400 that people seem to like, as well as the ReLoop Jockey 3. I believe the price range on all of this is within reason, although if I sell the S2 I would have to repurchase Traktor software (I believe). Build quality looks nice on all, however maybe slightly more confusing for someone like me who is relatively inexperienced? There's also always the option for me to just add an X1 with my S2 to gain the capability I want if I'm not mistaken.

I would just like to hear a little more about some of these other controllers and anyone's experience with them up against the NI controllers and if you believe they fit what I'm describing for myself. I have very little experience in doing any crazy custom mappings and whatnot so simplicity is a factor. I'll leave it at that for now as this post is beginning to get lengthy but I can answer any questions if it helps you make a recommendation for me.

Thanks to everyone in advance!