I had the nikon 300mm f4 AFS non vr version a few years ago and it was a great lens, very sharp and took the 1.4 TC very well. I was always impressed with the quality for the cost, it's a fairly lightweight lens if compared to the bigger f2.8/f4 lenses.
It's something I'm currently thinking of switching back to as my 200-400 is bigger, heavier and probably needs more use than I give it. My current thinking is either a 300mm f4, nikon 80-400 (new version) or a sigma 120-300 f2.8 but I'm going to have to make a decision in a few months ready for autumn.