Thanks everyone for weighing in, I appreciate your comments.
The 90% halves are easy for me to pick out. The 40'ers give me fits.
As for quarters, even when I put some 90%'ers next to the clads I sometimes have trouble telling the difference...don't get old there's no future to it. Not that seeing a difference matters much. I date sorted $2,000 worth of quarters and got skunked. Comparitor sorted another $1,000 and got skunked. Thought I probably didn't get the comparitor tuned fine enough so date sorted those and got skunked again.
Me thinks I'll leave the silver hunting to you specialists. I'll sort pennies like mad, sell the copper, and buy silver.
Again, thanks for your comments.