Here's the basics - I have a Canon Xt that came with the kit zoom. S'ok, but really, meh. I'm expecting delivery next week on the EF 70-200 f/4L USM, and expect that to cover 60-70% of my walkaround needs. BUT (you knew that was coming), I want something down the road that covers the other end of the spectrum. I am not likely to buy for a couple years--and may even have a new body by then, at that. I know most say that everyone should have at least one good prime, and I'm eyeing L glass in the 35mm range (with the 1.6X factor that gets me to 48mm). However, I'm also thinking a short zoom--like the EF 16-35mm f/2.8L II USM. (And yes, I know that there's a lot of good glass that isn't in the L series, but these are the last lenses I'm gonna buy. I may go through another five or six bodies, but I want lifetime glass.) So, my question to the group is this. On the short end, and assuming only ONE other lens, prime or another zoom?