Get regular Bosch copper plugs especially since your car is not running perfect yet. For now do not get platinum plugs even if "they" advise you to get them.
While you're at it check some easy things like the vaccuum connections that go into the firewall above the brake booster, follow the lines see if you see anything disconnected or torn, check the fuse on top of the OVP relay (red relay behind the plastic shroud behind the battery) it will probably be ok but it can't hurt to check.