I wouldn't buy that PSU. I've had good luck with FSP brand before but that one is very cheap and unreliable. Doesn't look like your going to be using this for games, if thats the case then this is a great PSU that I've used in a few different machines.
Stay away from Apex as well. Cheap cases are just that - cheap. They cut corners on construction and use poor welding and things of that nature, it's better to pay a little extra - even getting something like a Cooler Master Elite 430 will be infinitely better.