Upload & Sell: On
I'm afraid Steve that wishing seldom brings new lenses to my door, but I wouldn't send them away if they arrived...
I have about ten thousand dollars invested in lenses and either of those would cost a bit under and over 20% of that amount. Since the 180 f/2.8 AI-s is such a great lens, the added stop and 20mm of length for $1,500 seems an extravagance. The 500 is a stretch in another way since that lens would necessitate buying a tripod, which is something I've clearly resisted. Shooting long is very much a different beast from what I typically do with a camera. It might open some new horizons but I don't know that I'd be willing to spend $2,500 to find out. And again, with a 400mm lens I picked up at a bargain price, less than $400, the extra stop and 100mm seems an extravagance. I get my pleasure viewing other folks work with that beautiful lens.
Of course, we're about three weeks away from the third anniversary of this thread and for anyone who is vexed over what might be a suitable gift to the person who started the thread and nurtured it through its growing pains... you can give them a hint...