Depends on the build quality for me. My Samsung N3 is so **** I wish I never brought.

In terms of upgrades from N3 to N4 there ain't that much in it. Higher res and spen upgrades.
CPU upgrade is minimal (was expecting 64bit process)
Still no LED flash but at least they put a OIS on the camera (about f***ing time Samsung)
3GB ram and same battery

At the mo I can't see myself spend another $1000 on a Note
Samsung Galaxy Note 3 (SM-N9005)
Nexus 5 32GB
Huawei Y300

Nexus 4 16GB
Samsung Galaxy S2
Sony X1
iPhone (3rd Gen)
iPhone (1st Gen)