Thanks all for the comments. I'll be sure to post some shots as soon as I get it.
I know the comment about having it all covered is a personal thing.
My main concern is landscape and wildlife but I love macro also. The fast fifty will be good to have around for family shots to help back up the 16-50.
Of course I would like to have another 70-200 but when I did have one I didn't use it that much.
I am contemplating a Takumar 85 which I have owned before also so it never ends.
I am just thinking with the 300/2.8 I won't have the limitations anymore. I should have a fairly sharp 600/5.6 now without breaking to back too much.
Thanks again all