I'd go with #6 in a heart beat, 24mm is wide enough for landscapes and you could shoot panos for a wider field of vew and the 70-200mm. If you are willing to wait I would get theCanon70-200mm f/2.8, it will give more background blur and has faster focusing and a constant f/2.8 in your lens line up. If you don't want to wait and can give up some AF speed the Sigma or Tamron 70-200mm's are also worthwhile arternatives.


Save up for a ultra wide next and few of your favorite primes later on.


John.