I’ve an MPC1000 running JJOS 2XL, as well as Live with Push, an A4 and a Rytm. If I had to sell one, it’d be the MPC. Easily. While I like it for a change of workflow, I really don’t use it all that much these days.
The thing about the Rytm is the intangibles imho - it sounds great, can really smush up samples or do MPC60 boom-bap, but more than that, it’s the feel. I know some people think the elektron workflow is intimidating, but I took to it right away on the Rytm for whatever reason - much more than the A4 - it just sounds and feels right to me. In fact, it feels like a future classic.
Haven’t quite warmed to the A4 to the same extent as yet, then again I’ve only had it a few weeks. Agree 100% on the presets, but I’ve started to get some good sounds - particularly poly keys/pads and unison basses - and I find it quite immediate, even if it takes a couple of button pushes to get at certain parameters. Haven’t really gotten in to using it as more than a sound module for Live as yet, I’m sure once I get in to the sequencer and p-locks it’ll all click.