Other options for you include HIS HD 7970 IceQ X² GHz Edition for £359.99
or the Gigabyte ATI Radeon HD 7970 GHz Edition Windforce 3X for £369.95
As for your original two options, I didn't really consider the Asus DCUII. It didn't seem to be any thing spectacular like the GTX 670 TOP version was. I did see the Vapor-X mentioned a fair bit, but personally didn't find any compelling reason to go for it over some others.