I had two D300 bodies for three years and a D700 for a month before I got my first D800. I sold my first D800 when I received my first D800e and realized how much more that I liked the e. I have since bought another e. I have been shooting the the D800e bodies since July.
The D800e bodies do everything I ever wanted to do with a digital camera. I shoot landscapes from a tripod and birds hand held with a BushHawk. If I use the appropriate settings for each, I get the most incredible results I have ever seen with a digital camera.
Would I go go back to a D300 or D700? No way. Would I like a little less noise above ISO 800? Yes. Would a I spend a zillion $$ to get there with a D4? No.
I have only found one issue with my D800e bodies (as noted in another post today). Sometimes my ISO gets changed from a fixed number to Auto ISO because I either turn the wrong controls when making a different change or because the control gets turned when I am putting the camera in the bag and I forgot to turn it off first. That is it.