In reply to ReeceBCooper:
The Himaltec fabric that Sherpa use for the Lithang is really nice (waterproof, breathable, soft-ish, has a bit of stretch), however, despite Sherpa claiming that the hood is helmet-compatible, I've found that it's too small to go over a helmet (I've tried with both my Grivel Stealth and BD Half Dome). Well, it does go over, but then you're left unable to move your head because of the tight fit.
The Janak is a slimmer fit than the Lithang, especially at the shoulders/delts area. I haven't had much luck with ME waterproofs durability-wise, so I've switched to Arcteryx for this reason, however your mileage might vary.
If you don't need to wear a helmet, out of the two I would choose the Lithang (just because I can't be bothered to give ME waterproofs another go). Plus, you should be able to find it for under £200 (I've had two - I paid £100 for my first one, and I think around £150 for my second one)
However, if it doesn't have to be one of these two, I would choose something from either Patagonia (I hear that the Triolet is very good) or Arcteryx (Outside currently have the Alpha AR for £339. Sportpursuit also have Arcteryx deals every 3-4 months)