Wow! Thanks to all for the thoughtful and concise responses to my quandry.
I have sold the D300 to a friend, along with a 18-200 f/3.5 lens and other miscellaneous related items. I got the D800 for a number of reasons and that it has DX capabilities is OK, but I really dont have any plans or need to use it. But...it's there if I do.
I was on the fence regarding keeping the 17-55 and I have now decided to sell it and apply the $$ to the 24-70 and other desired glass.
It ain't so much the things we don't know that get us in trouble. It's the things we know that just ain't so. - Artemus Ward