I haven't tried the Maschine Studio, but to be honest I think the standard Maschine controller is fine. Sure the screens on the Studio look nice but the standard Maschine is USB powered and much more portable.
That said, the software is EXACTLY the same on all models (including the Mikro) so there will be a slight learning curve whichever model you go for. But it's not that complicated and there are countless tutorials on Youtube so I'm sure you'll be fine.
The "best Maschine" IMHO is the one that suits your requirements (and budget) the most.