Wow thanks for all your replies, now I am more confused than ever LOL
Yep, I am not too hulked up, can carry a car or two :o)
Well, this is the thing, my fav lens is the nifty 50 for FOV BUT the 85 I could maybe pick up for $700 mint so if I ever went FF that would be my 50...I actually don't like too much the long reach with the 85 1.8 (on the D300) and was thinking of the 1.4 as more of an investment in case FF one day, is that crazy? I wish I had a 1.8 and 1.4 to compare side by side...
I don't think I would like the 70-200. I rarely shoot people with my 55-200. I think I am getting caught up in the iconic status of the 'cream machine' and the nice used price. I dunno!
But, def. the 50mm is my fav on my D300...
Alright to sum this up:
You don't like a larger and heavy lens
85mm on your d300 is a bit past your limit
You already noticed that a faster 50mm lens is not any sharper, that 50mm F1.8 is actually on of the best lens deals you can get, the canon is crap in comparison
So if you need to get something new maybe get this one
"AFS Micro-Nikkor 60 mm f/2.8 ED G N"
This lens is sharp, it has a mm size that you like, you would have macro and it would also work on FX