The answer is.... years of experience will tell you what get you need.... not dropping nearly a grand (if you buy them new) on gear you might or might not be suited for in the end.
It doesn't matter how much nice gear you get/how you can connect it/what is possible with the combination unless the fundamental music skill is inside you. Nice gear/awesome sounds will not get you anywhere until you have the know how to tame it.
What will get you the best possible sound is the fundamental understanding of things like synthesis in a very intuitive way.... for example... knowing what cross modulating two sine waves will do to them before it happens... and being able to predict what that next knob turn will do. Or... for example knowing that this sample that is currently playing at normal tempo has a lot more potential to be played one octave higher.... with a shorter decay... :-/
Get my drift?... the above two concepts have nothing to do with any specific piece of music gear... but the concepts can be applied to almost any piece of music gear (or software).... therefore it's not the gear... it's the operator.
There is nothing wrong with the fact that you can afford to get the gear to simply experiment with what is possible... I would just recommend that sticking to one piece of gear and learning every single feature will be more productive because that knowledge can be applied to all music gear in a universal way... rather then trying to connect multiple foreign domains together with unknown concepts.