I really like those last two kits. Looking at the sprues Intercessors are a bit better because they have separate leg and shin armour so it will be easier to convert it. Also legs as separate bit are great.
I like how cleverly is done weapon option (stalker/rifle, heavy/assault plasma). If you could find such little magnets and magnetize it you could change it easily.
But no Primaris for Black Lions this year. My money already went to new gaming rig.