Think you need reality check with the price. You can buy it new for £450 and get £75 cash back from HP, making it £375.
Not sure Office Pro 2007 sweetens the deal much, not many people will need the Pro version and Office 2010 is out.
I was going to mention that £375 price but I didn't want to upset sippo. That offer is only available until 30/11 I think tho jonny. As far as office goes there's always Open Office, it's freeeeeeeeeee