Originally posted by WMBP Life would be much simpler if I were rich.
No kidding!
No good advice here - my first thought on seeing your list of equipment was "a fast prime" and I'm partial to close up shots of details, so a macro would be a great choice, but I wouldn't choose a macro or ~100mm for a wedding/banquet/other event.
When you think about a second body, think about how you'll be using it. I find myself fumbling from time to time going from the K10D with dual control wheels to the DS. But the DS, DL, and 100 have their strengths as well. How easily can you change from one to another and does it matter for the photography you're doing? It may for you, though for me as a strict "hobbyist" it doesn't so much.
Good luck with your choice.
PS - people speak highly of the 90mm Tamron as well, so if you go the macro route, you might look at that as well.