Really? Can anyone confirm this... I'm confused! :/
yes the ASUS® P8Z77-V: PCI-E 3.0 READY, WIFI, SLI, CROSSFIREX" does have onboard wifi.
You can read about the motherboard here,
It would certainly be worth having, I have no idea if its any good, but if you did invest in homeplugs (as pm suggested) then win 7 will still connect both wifi and wired connection at the same time. I do not know if it will give you a boost in internet performance on ya desktop though.
Right, so in this case.. I don't need the Wireless card for the extra £16?
And the GPU is the i5-2500k.