Oh don't get me wrong, from a value perspective it's just not there but I'm a sucker for a screen and I've heard a lot of the Nano units failing in the wild. Plus Braiins/Slush is just awesome; I forgot to apply the coupon code for 10% off because I'd mined at their pool so sent them a message after I paid asking if I was screwed or not. No matter they said, just send us an address and we will send you back 10%. Winners in my book!
Also, I like having the option of hardwired as well as wifi. Don't like my devices being on wifi if they don't have to be whereas the Nano 3 is wifi only I believe?