I think if you can get it for $560, I'd just buy it. Sure you could wait but no one knows what the future holds. 6900XT for that cheap is an incredible deal anyway you cut it.
Yeah if it reaches that price in the UK, I'd be awfully tempted. And that game included bundle is a great deal for two new and unreleased titles.
I think value wise this is probably the best you can get for a high(ish) end GPU, outside of getting into the used market.