Anything made by Montane.
I have two pairs of Montane over trousers, one waterproof, and the other a pair of their Featherlite pertex windproof over trousers.
The featherlites can be packed so small, that you can close your fist over them, and not know they are there, and are fine in light rain, but not stair rods stuff.
The featherlites are great for when its howling a gail, but there is no rain on the horizon.
The Montane trousers are beautifully made and are all manufactured from their Pertex material, which as we all know, is amongst the best windproof material on the market.
I have disliked GoreTex simply because the main manufacturers charge a huge premium for the material, and technology has improved incredibly since its introduction.
Just about all of Montanes clothing is lightweight, and the equal in quality of any of the bigger names.
Their current model, the Atomic trousers are similar in design to the ones i bought several years ago, and use Pertex.
At around £80, their not especially cheap, but compared to a GoreTex model from say Berhaus or Mountain Equipment, you will be saving enough money for a good meal out somewhere nice.