The Zen is a total bargain at £30. There is nothing to touch it for the money. That Akasa Paxpower power supply is also excellent, although it is a fraction noiser than the equivalent 380W Tagan Silent (also about £40). One big advantage of the Akasa is it has extra-long cables so if/when you upgrade to a P180, Eclipse or Antec 900, you won't need any extensions. The current ones also have two SLI connectors directly wired into the PSU which is unusual in a budget PSU.
I certainly wouldn't be ashamed of that combination.