Probably more monitor calibration as I matched the two color balances and one, of course is closer and more detailed. I agree that it is a pretty good shot and I most certainly appreciate your input. I'm getting better all the time.
I have an opportunity ot purchase a Nikon 300mm 2.8 afs ii. It is non nano coated and no vr for $3,100. Would this, combined with my 1.7 teleconverter be a good purchase?
First, if you're indicating that your monitor is not currently calibrated, I would definitely recommend addressing that. Otherwise you really don't know where you are. Fortunately there are some relatively inexpensive methods (I use the Gretag MacBeth - now XRite I think - i1 Display, and it does a reasonably good job).
As for the Nikon lens, as a Canon guy I'm not familiar with any particulars on this lens. But if it's anything like Canon's 300/2.8 IS lens, it would be a very worthwhile lens to have. The Canon version is considered one of their sharpest lenses ever.
Either are obviously quite expensive, but do provide a wide range of shooting opportunities with or without teleconverters. I don't have one, but would be proud to add one to my collection one day. The problem for me would be it's hard enough taking the gear I already own, including the big and heavy 600L/f4 IS, onto planes and into the field...