I try to stay away from OTC products but I have tried them all so i know good and whats not lol.
Any OTC Claybar kit will do the job. I would either get the Mother's Kit or the Meguires Kit. Out of those 2, i prefer the meguires kit because it comes with a towel and a case for the clay.
As for the Wax, The gold class is the best from the ones you listed. NXT is just full of Filler so i stay away from NTX.
If it were me, i would either go with Mothers California Gold Pure Carnauba Paste Wax or Meguiars Mirror Glaze #26 Hi-Tech Paste Car Wax. Out of those 2, i prefer the Meguires #26 because IMO its a Deeper wax and looks great on metallic paint.
Next time you buy Detailing products, try to order online because there are alot of great companies out there with products that blow OTC product out of the water. Companies like DoDo Juice & Chemical Guys Make great Waxes!!! Chemical Guys 50/50 is my personal favorite at the moment and is currently on my paint.