Depends. The two main issues I see here are 1) what exactly do you intend to do with the sampler and 2) is this more drum-centered or sampler-centered.
For the first point, is the idea that you want to live-sample and manipulate that flow (in which case the Morphagene is perfect) or to have a large amount of triggerable samples onhand in various banks?
As for the second, the real issue will be the sequencer. If you plan on doing a lot of pitched-type electronic percussion, then the Eloquencer is excellent. But if the idea is to use 'fixed' drum sounds, then something simpler and more trigger-oriented might be better. Plus, whichever choice is the primary idea, you'll still need to control a sampler. The Morphagene can work fine with something simple, but if you want a lot of samples and such under the sequencer's control, then something more complex such as a Squarp Hermod might be a better idea.