Hi Diego,
Thanks for recommending the Mannequins - Three Sisters filter module. Did you had a chance to have it tested at a dealer? I don't have a dealer nearby that got this module (or this brand). If you did had it tested, please let me know your experiences.
Regarding sequencers, I feel it's very difficult to find one that really suites one. I have a few smaller ones but for a big sequencer (minimum 3 tracks) like you mentioned, I still haven't found a suitable one for myself. The two you mentioned might be good ones but with their menu structure "scare me off" a bit. I prefer to have as less as possible menu stuff and direct knobs and buttons for as many as possible functions (i.e. without many button combinations or menu layers).
I am currently looking at what Endorphin.es with their Ground Control are doing, I am waiting till it comes available at my dealer so I can have it tested, hopefully soon. Another one I consider is the one from Erica Synths - Black Sequencer however no indication date yet when this should become available. You might want to have a look at those both too, though they are both wider than the 26 HP you were mentioning. Just remove the Toolbox and get yourself a sequencer that does what you want and need :-)
Kind regards, Garfield.
For review reports of Eurorack modules, please refer to https://garfieldmodular.net/ for PDF formatted downloads