i am a little late in this discussion, but maybe anyone is still interested in another experience.
i would really prefer the contax t, if you get one.
this little camera is superb.
i am a photographer and i like to use small cameras for whatever subjects. i own a contax t3 and and contax t and some months ago i sold my contax t2.
in addition i have a rollei 35 s.
so if i compare these cameras, the contax t or t3 are definitely the winners. for whatever reason the optical quality of the t is better than of the t3. you should think that contax would improve their lenses during the years. but the contax t lens is definitely sharper. you can compare it with the lens of any slr or high end rangefinder camera.
vignetting is very low or not visible, depending on aperture of course.
and it has no distortion as well.
i always thought, the lens of the t2 is the same, but at least my copy was not that brilliant (a good over-average camera anyway).
the t3 is a fantastic pretty fast point and shoot camera, with a superb lens, the difference to contax t is as i mentioned the lesser sharpness but therefore it is a bit more contrasty.
the rollei 35 s is a great piece of camera design and construction, but it's not that easy to handle and it has no rangefinder like the contax t.
that's what i can tell you in a brief form about these objects of desire.