Bought an N4 Monday as a replacement for my GN.
Seemed a no-brainer really, screen res and CPU architecture gen aside its the same spec the S4 and one, at half the cost sim free.
So a trade between screen PPI (above 320 so wont notice anyway) and gaining Wireless Charging.
Anyway, had it for 10mins, updated it to 4.3, played with 4.3 for 10mins, then unlocked, rooted, replaced recovery and wacked my usual ROM, AOKP on there.
Set it up the exact same as my GN and i'm utterly amazed that i haven't seen a single piece of slowdown or stutter when i'm using it, to do anything.
Very pleased with it! 12 months on and its still a monster of a phone!