wet weather gear

[greenmanalishi]

Hi peeps not had to make many posts as nearly all I ever wanted to know has been covered by threads found here, however what wet weather gear do most people use? I want to use something that I can take out of my top box when it rains instead of relying on something waterproof to start with (too hot, too heavy). I know the the Mondo men used Ponchos instead of waterproof textiles or leathers but I have been advised they are to "flappy". I have Revit gear but have found that it is better to stay dry than rely on a waterproof inner which means the outer gets soaked and takes ages to dry. I require something which is light, takes up a small amount of space and is relatively inexpensive. I have a pillion so will require two sets. Any thoughts or suggestions will be gratefully received.
Thanks in advance
GM