Scuse me, I am italian and I speak english just a little.

I have a canon 10d and the following canon lenses: EF 14/ 2,8L, EF
17-40/ 4L, EF 70-200/ 4L.  I would want to begin to make some
architecture-photos and  I take an interest in the canon lens EF
35/1,4L  ( for the exceptional bokeh). Alternatively, only 
alternatively  (both the lenses are too much expensive )  I take an
interest in the canon lens EF 24-70 /2,8L to cover the distance between
the 17-40 and the 70-200 lenses. What I must make?  Can I have your
opinions ? Thanks.

Quostat