Nice gear so far. As far as upgrade I would ask the question "what would help move my career forward?"
If that is all your current budget maybe it would be helpful to invest in a website or some advertising for your service/beats/etc.
If its strictly for gear and given that you don't have monitors then all that cash can just run into a good pair of monitors. Is that a good idea? That is up to you.
As far as the Machine..is it REALLY going to move you forward? You already have drum pads on your keyboard.
I would go against collecting gear for the sake of it and instead invest on things that will help advance my career/business.
Hope it helps.
Maschine is a very different workflow.
Personally, I rate it highly. It's my favourite piece of gear where everything starts and the hub of my setup.
That said... You could do a whole lot more with Ableton Live an Push2.