If you were a big MPC person, I say just focus on the OT/OP-1 sampler combo for a month or so and really get that down (composting loops for the OT on the OP-1 is GREAT and I had a ton of fun chopping samples and MPC-style sequencing them on the OP-1).
In fact, your best bet is to lock yourself in a room for 2-3 weeks with each Elektron box you get before you move onto a new one.
A4 will be waiting for you to round out your sampler/digital synth compositions with Analog character.