If anybody is thinking of replacing their GPU or building new completely this new offering from AMD is worth noting.
Early benchmarks show the 6870 performing in between the 5850 and 5870 (slightly better than the GTX 460 1gb too) at around $250/£200 which is pretty good value imo.
Not worth the upgrade if you already have a mid to high range 5 series or a GTX4 series but then we knew that would be the case anyway.
The 69xx cards are due late next month.