I would guess any of them would do the trick, as I doubt youre wanting them espresso-fine? A Solis 166 / DeLonghi KG100 if you dont mind spending $150 on ground nuts, otherwise a EM0450 would do nicely. Or if space isnt an issue and you want to spend a bit less, grab a Eurolab machine and use the grinder out of that! I understand theyre not adjustable though.
Really though for nuts, size consistency probably isnt an issue so a blade grinder / blender should do, no?