If you're not impressed with the A4 yet, just check all the soundpack demos from elektron.se
Codex and Biopads are my favorite ones on there
Walker / Next Level also great.
But yea, my AK loves these FM drums, especially the METAL ones.P-locked with pans and AK's stereo voice outputs, it makes it one hell of a drum machine with 8 outputs + stereo FX outs.
Thank you. @EasternNoise