When I got started with Elektron gear, I’ve chosen Machinedrum and Blofeld which was and still is a very cost effective as well as powerfull combination of drum and WT synth. As someone described earlier in this thread, there are some issues and limitations with Blofeld’s multimode mode (solved much better on the Virus TI it seems), but you can create a wide range of sound, play them (with some limitations) in parallel based on different midi channels, as well as it’s possible to load some samples into Blofeld (requires an extra license) that can be sequenced. Sound design on the Blofeld can be done with the Ipad app “Patch Base” meantime in combination with “Fugue Machine” for sequncing, which makes it more comforable and more effective for me compared to the few knobs and the display on the Blo’.
Second I like the MB33 to sequence which is a 130€ Bass Synth and is extremely close to a TB303 soundwise.
Since I’m a Machinedrum user when it comes to sequencing external gear I cannot say how Blofeld and MB33 work with the Digitakt, but very sure it’s an as good as or even better experience sequncing and resampling them with the Digitakt compared to the MD.