If you can wait until November, pick one up at the bike show in Birmingham. I got a good bit knocked off the price there and full choice of sizes to try on.
I love mine. I dont do enough mileage on the road to warrant splashing out for the BMW gear, but as far as I can see so far, it is as good.
I have had no issues with the waterproofing, even powerwashed myself after a day offroad, and stayed dry underneath!
A few small issues to point out. The lower leg is slightly narrow, and wont fit easily over an offroad boot. Also, it would be nice if the jacket arms zipped off.
The trouser pockets are very handy, and there are loads of removable panels and zips to adjust the airflow from cold to hot weather. I find in the cold, with the zip in thermals, I only need a light teeshirt underneath. Havent really had it out in very hot weather yet. But the thermals, goretex liner, and main jacket come in three separate layers. The same goes for the trousers.
best of luck!