i'm covered for my ultra wide angle (tokina @ 16mm), my fast prime (35L don't want to bring the 50) but i want a versatile zoom. i love the idea of the 24-105 because it's light and good for different film shots (not to mention cheap in comparison). i definitely want to get footage while abroad. at the same time, i just came into a chuck of cash and could shell out for a 70-200 (preferably 2.8). but is that much of a zoom necessary for walking around europe? i was there when i was younger but it seemed like i'd normally be going for wider shots all the time. if i go 70-200, i want to get the 2.8 II as it's a lens i plan on having for 5-10 years. will the weight be ridiculous to carry around all the time? should i go for f/4? i really don't know if i'll ever need it for indoor low light events.
i should mention, i'm going to stay mostly in england/london, with the hopes of taking trains to france, germany, and italy. help me decide!