Keeper options/question

DJ, Chubb, Conner, Dalvin, OBJ, Luck

8 team PPR league (1 qb, 2 rb, 3 wr, 1 flex, 1 superflex). Can keep up to 3, with each keeper costing a Round 1/2/3 penalty respectively, starting in Round 1.

I would keep Chubb, Cook and OBJ.