I have a Aver Revo, it has HDMI output and wifi, great machine for XBMC. I've disconencted my'n now and I use it as a normal PC because I thought it was overkill to just use it for XBMC. I now have a Raspberry PI running RaspXBMC instead cheap and cheerful fanless so it;s silent, very low power usage uses a mobile phone charger... It doesnt have WiFi though used a wired connection. BUt for 35 quid..cant be beaten.