I'm rather taken with the Maserati Gran Turismo Sport. Pity I don't have a spare £100,000.
Lucky old Jodie Kidd is seen here being a Maserati ambassador. She was chosen because she plays polo and also, I'm guessing, because you need one hell of a skinny arse to look good in white.
Maserati partners with sports brand La Martina, so Jodie is modelling some of the latest range of polo-inspired kit. The new designs were inspired by the shirts of the Italian National Polo Team, who were sponsored by Maserati during the European round of the Polo World Championship Playoffs. Very complicated, very posh. You can see more here
Personally I'd go for the Convertible, of course. It oozes gorgeousness. I suppose your groom drives the horsebox home after the polo match.