The bull elephant hunt, for sure. There are plenty of cheaper trophy elephant hunts, but a Botswana tusker should be over 50 pounds per tusk, maybe 70+. You WILL be into elephants regularly, sleep in a real bed, and eat great food. Success rates are very high, the real question is will the ivory be huge or just really good.
I get the sheep hunt, but success rates are low and you will work your ass off and still may not get a sheep.
I've hunted elephants (3) and sheep (Dall-3), and I am very fond of my successful Dall sheep hunt. (The unsuccessful sheep hunts I remember a little less fondly. All my elephant hunts were successful.)
A stone sheep would be a bit higher on my list if I was still in my 40's, maybe even 50's, but at 60+ I WILL book another elephant hunt, and will still hunt Rocky mountain sheep, but may never justify going on a stone sheep hunt.
Bill