I like white roses as well. Iceberg (climbing) is hard to beat. There is a fairly new white rose called Pope John Paul II which I want to plant next season.
We can't get it here in New Zealand yet (as far as I know), but Im looking forward to it being available in the plant nurseries next spring.
Absolutely stunning, when in full bloom.
A mass of 1000s of pale yellow flowers, each one only 1-2 inches across. A light fragrance,
as well as the almost total lack of thorns, make this rose a great addition to any garden.