good enough, beware of pcpartpciker for costs:
http://www.scan.co.uk/todayonly/index.aspx#6
the 660's available at 10 cheaper. If you get that on a few more components you can get a better cpu possibly.
PSU is ok, but a bit on the small side should you want to update to a beefier GPU later.
Personally i'd get as good a CPU as you can as the gpu is a lot easier to upgrade and use the foundation of a good CPU to last you for at least 1 gpu update.