I used to be indecisive, but now I am not so sure.....(!!)
Yes, I have decided to go for a 17mm Nagler (not 16mm) after some helpful comments from others (thanks, esp. to Satchmo).
So, the same question arises......does anyone want to part with theirs, for the right price? I am expecting the answer is "No" because these EP's are so good, but I will give it a chance for a few days to see if I am in luck.