Note: I removed this because I thought it was a duplicate, but apparently the other OcUK deal has expired and is now back at £575. Also this is from Amazon.
This card is pretty decent in terms of thermals and acoustics (using the GameRock values, the coolers are very similar). Takes up 3 slots so keep that in mind.
I think for now this is about as good a deal on a 1080 as you're likely to expect. Still way overpriced but this is considerably cheaper than normal.
Expired about 30 seconds after I submitted it. Such is life...