Reply to VCI-100 vs VCI-100mkII vs S4, some questions

Hi

I use the vestax vci 100.
I would like to upgrade into a new version to be able to have more features and be able to control 4decks.

I had a quick glimpse in a music store but wasn't able to test any because there were way toooo many and I didnt have enough time. I have heard of the new S4 but was not yet able to see it anywhere because it were sold out...

What would you suggest that were as stable as the vci 100? I saw the vci100 mkii but I wasnt too impressed because of its plasticity or am I mistaken?