Today my SP3 arrived. It is the i3 Version. The device looks new. The pen, the cover and the charger were sealed.
Well, that is a downgrade in performance then. So you get better pen for note taking, larger screen (better aspect ratio), but you loose on performance a lot (it would have been less if you got the i5, as the SP3 does throttle, compared to the SP2, due to the same chip being used, but you are only 1 fan/heatsink, while the SP2 has 2 of them... and larger). I believe you do get a bit better battery life, and you get to enjoy the multi-angle kickstand, and improve power connector. Come to thing about it, you can also enjoy the SP4 keyboard.
So if performance isn't an issue for you, it is a nice trade off in my opinion.