Can anyone recommend a good monitor for editing D600 photos?

IPS monitor with at least 85% gamut.

Covers most needs and should do for D600 as well.

Eizos are nice but overpriced. You can do almost as well with a decent Dell/NEC/etc. paired with a calibration tool like Spyder.

Honestly, unless you're doing magazine work, I would not stress too much about this and get something that fits your needs and budget.

--
What you know imprisons you