Thanks, ladies. Botswana is definitely one of the other countries we're considering. Pricewise, I think Tanzania is cheaper and I like the idea of seeing (if not actually hiking) Killimanjaro. I think the trick with either will be to find a reputable tour company that offers the kind of safari that we want, for the right number of days, for a decent price. I'd prefer local or at least one that puts a lot of money back into the local economy and one that is environmentally conscious. About.com has some good suggestions that meet both those criteria.
Live with intention. Walk to the edge. Listen hard. Practice wellness. Play with abandon. Laugh. Choose with no regret. Continue to learn. Appreciate your friends. Do what you love. Live as if this is all there is.
--Mary Anne Radmacher