Help to choose

Was looking into the big and good kit. MG Sazabi and Monument the same peicw for me. Want a good, enjoying build for big gunpla, so little bit scared about monument repair, I builded 4 rgs, 1 hg, mg sinanju I've seen that repair is very good, but have fear that it's needs more work to do than just build it(not mentally ready for anything than out of box smooth and joyful build)