i haver been using good quality (Gore and Freestyle) relatively heavyweight (ie not paclite) Goretex cycling specific jackets for the last 15years and they have kept me dry and more importantly warm in big deluges (New Zealand 40mm/hr and big thunderstorms in the alps) - most important to keep them relatively clean and to give them a dash of Grangers or similar every now and again - good ventilation in the form of pit zip or poppers to convert into semi cape helps stop the boil in a bag syndrome
expensive but I find last for five years whereas cheapos tend to be useless after 2 winters
expensive but I find last for five years whereas cheapos tend to be useless after 2 winters