I’m sort of in the same boat. I was torn between the Live and DT when they both came out. I don’t plan on getting rid of the DT, but the Live is on my radar again.
I’m not really playing out these day, so, for now, I’m not sure that the MPC would bring much to the table. I just added an Arturia BSP (already had a Keystep) and am starting to mess around with NI Komplete and Logic. I had an MPC1K for years so I’m hoping I can do a few MPC-type things with the BSP and Logic that I can’t do with the DT. I figure if I can scratch the itch it will save me a grand.
I’m honestly loving a hybrid setup at the moment. If I was planning on playing out, it would be a different story though.
It helps that I had to get a good computer for work, so it was easy to justify a powerful (and aesthetically pleasing) computer.