At the moment, my setup is:

VCI-100 1.4FW using DJTT mapping
LPD8 - used to control loops and sample decks
Launchpad - used with a 2 deck 2xMidifighter Instant Grat, sample decks and cue point mapping

My plan was to swap out the VCI and LPD8 for a more "all-in-one" for 4 deck controller without needing to pay anything extra, hence why I was looking at the VMS4. Then, I'd keep the Launchpad for the 8 hot cues, 2 Midifighters, sample deck controls etc.

Any alternative to the VMS4 at a similar price range, or at a range that I could swap the VCI + LPD8 for?

That Denon MC6000 does look awesome though!