As soon as I had the wireless active the unit started to be slower, sometimes seemed to freeze. Just unplugged the wifi dongle and everything seems OK again. I left the wifi disconnected because I am often on business trips, and I don't want calls like "daddy it does not work"... I will do some further investigation on this during my x-mas holidays.
Nice to hear from another happy user!
Regarding Wi-Fi I have similar experiences but only when using "N". Switching to "G" makes the occasional freezes go away for me.