I'm glad to hear you are doing so well and am looking forward to seeing your photos!
After reading all these replies, I am going to put the D810 on my wish list. I definitely would like to have it for the advantages everyone listed, but I am going to work on my skills with the D600. I should probably get a better tripod and a there are a couple of lenses I need (want) so this helped me decide I should spend my money there first.
Thank you for the great advice. Is is best to post pictures in the photo gallery for critique?
This is my first time posting, and would like to know if there would be a great advantage in moving from my D600 (which I really enjoy) to a D810. Photography is my hobby, and I want to continue learning all I can about it, so I'm really glad I found this forum. There are so many of you with so much knowledge and experience. Thanks for your thoughts!