This offer finished in early September. If you ring up Sevenoaks sound and vision currently they are doing 15% off av receivers so you can get the Onkyo 605 for £340. You will have to wait some time though for delivery as they have none in stock.
Check out www.ssav.com or buy Whathifi's awards 2007 magazine for details.
They currently have loads of offers at the moment such as 20% off av speaker packages.