Forgive my novice question, i hardely have any experience with car maintenance. Need to replace my front lower ball joints and front caster arm ball joints, from what dealer has told me. Should i stick with the parts they choose or is there a better choice to go with?? Thanks in advance.

On your car I would not recommend using anything but the factory parts it came with. There's a lot of engineering that goes into designing those parts to work in harmony with the rest of your suspension. The parts your dealer has are the ones you need, albeit probably a bit more expensive than they could be sourced from elsewhere.