It says the case comes with a top 140mm fan and a rear 120mm fan. They usually plug into a molex connection on the power supply. As for the power supply pending on which graphics card you decide to go with you could get by with a 600w pending on the amps on the 12 v rail and the cards requirement.
I always believe you should buy a quality power supply since it is a core component in your system so I tend to by more than I need leaving room for upgrades, more fans, hard drives or xfire or SLI so I would recommend a 600w. an Corsair, Antec Coolermaster of course pending on your budget they have some good ones on your site Power Supplies - 600W - 699W | Techbuy Australia
Hope this helps. Fabe