In the near future I want to switch from my EOS 400D body to the new EOS 5D Mk3 body. At this moment I only have my 70-200 f/2.8L USM lens which I can use on a full frame body. This piece of glass is nice, but I would like to expand my collection with a lens for shorter focal lenghts.
In the past I used my camera mostly for landscapes, holidays and some low-light scenes, but I am getting more serious and also started shooting pictures of concerts and portrets and more demanding low-light scenes. My current EOS body is just too simple for those things.
I don't have an infinite budget and I want to keep it affordable. On the internet I read different reviews and storys about different types of lenses such as the 24-105 f/4 and the 24-70 f/2.8 Mk1/2. Because of the ridiculous price of the Mk2 version, I am not going to spend my money on that one. Reviews of the 24-105 vary allot. Some say it's awesome, others say it not worth the money. To keep it short, there are allot of lenses on the market and I don't know them all nor do I want to read reviews of them all. Therefor I think it's best to ask other people (read "the professionals") about their experiences and opinions, just to narrow down my search for a nice addition to my collection.
So..keeping in mind I only have the 70-200, what would you guys recommend me to have a look at?
Thank you in advance!