The Model Samples is like the Digitakt Light kinda how the Digitakt is the Octatrack Light. I have all 3 but I am not keeping the Model Samples. I just picked it up for cheap and thought it might be a fun device to travel with. Ended up picking the Polyend Tracker for that task.
About Samplers, it all depends what you want to do but I say you can't go wrong with any of the current MPCs, The Force, Polyend Tracker or Digitakt/Octatrack. It just depends on your budget. I am obsessed with samplers/drum machines so if you have any questions on any of those i'd be happy to answer.