Introduced this year at Superbooth, Polyend Play is a 64 step MIDI/Sample sequencer with some features borrowed from the Polyend Tracker. As well as grid based sequencing, you can edit repeats, chance as well as many other sample parameters, or put a different sample on each step within a track if you prefer. It been getting high praise from Ben Jordan and Loopop too.
Available now at most music retailers priced at £699, $799