You know, I've found that the 70-200 2.8 L IS is my most used lens. Being that you know you want the 70-200, I'd like to suggest that you purchase the 70-200 first, do a few shoots and then expand your lens kit. That's likely to give you a better idea if you need the 16-35/17-40, 24-70/24-105 or one of the prime telephotos. It's hard to say what you'll find, but you may decide that the 70-200 is so wonderful that you don't need other lenses. Then you could invest your money in other fun stuff like an epson p-4000 or something like that.