Of the ones Reg listed I'd say the xxx hardcore wax will give the best look but it'll need top up coats every 1 or 2 months, if durability is looked for then the Collinite would be my choice, 2 coats will give at least 6 months protection.
However if you really want to pamper the car, i would look at a wax that gives a great finish, really wet look and a warm glow, for this you really need a high % of Carnauba, the down side is durability on most run of the mill ones will be a month max, those in this category would include CG's 50/50 Connoisseur wax, Souveran Pinnacle or Swissol Onyx, these are priced in the £25-£45 bracket.
On-wards and up-wards in price, looks and durability the sky is the limit, literally.