In reply to marijnpeter:
I own a Rab Super Dru. It fits me excellently, was a reasonable price (for a lightweight mounatineering jacket) packs down nice and small and breathes well.
Unfortunately after 12 months use it also leaks like a seive. I tested this by putting about 2cm water in the jacket and leaving it over a jug for a couple of hours. after 1 hr all the water was in the jug. I sent the jacket back to Rab who confirmed the jacket leaked but I could not recieve a new one as, apparently, the jacket that is ideal for guides, had been used too much. (I had used it a fair bit, but I'm not a guide and was living in the Alps for most of the year so didn't have to get the jacket out my 'sac too often, it doesn't rain like in my native Scotland!)
Now I just use the jacket for ski mountaineering when it only has to deal with snow and wind, which it copes with admirably, however it's not quite what I was after when I bought it.
Hope this helps, by contrast my wifes Berghaus paclite is now 6 years old, winter and summer, ski touring and climbing, still keeps the rain out.