I have not personally used the Beatstep Pro, but many within this forum swear by it for sequencing. As far as I know, you wouldn't need a Shuttle Control as the BSP has CV I/O for two tracks of melodic sequencing and a bunch of drum triggers, as well as CV and midi I/O for clocking. You could use Pamela's New Workout as your master clock, send a gate to the BSP clock in, and you are all set. All for $300 or less.