I posted this in the D4/D3/D2/D1 room, but would like thoughts from your side as well
"Need some thoughts on which direction next. Currently using a D7000 and learning things as quickly as I can. Had it in the back of my mind to move to full frame sometime in the future, but currently have no suitable glass. Now, a very dear friend, very eccentric and always buying very good gear, is giving me first dibs at his D700 for $650 or his D3 for $800, both very minimal usage, as in couple of dozen shots out of each. Bodies only. I think I'd be silly not to take up his offer. I shoot mostly nature and landscape, with some sports, being cycling and and motorsports, but only occasionally. I don't plan on ever going pro, prefer to just enjoy the hobby, but I do love good gear. My sensible side tells me to go for the D700, my irrational side says stuff it and just go the extra $150 for the D3. What side should I listen to?"