I bought a 1010Music BitBox. It responds on up to 16 triggers, or I can avoid the mess using MIDI (some sequencers output MIDI as well as CV). There are four outputs so it's decent for separating my outs if I need that. I can add new samples to the SD card, and with a little bit of XML editing on NotePad++, I can quickly put together whatever I need and avoid doing things slowly on the front panel.

I have some other stuff capable of percussion like the BIA... but sample playback seems to offer the most bang for the buck. There are plenty of samplers and ROMplers out there. You don't have to go with BitBox. But I would just rather sink resources into other areas besides percussion.