Looked at the 2.8 and 4 of the 70-200 and the size and weight is astonishing! Stick the 2.8 on your camera and you've got a dumbell, comparatively in price I'd go for the 4 now i've seen em.

As for the 50mm 1.4, tis ace so far, AF seems to be utter sh*te though, but a very good lens otherwise. Got some shots on my flickr that I took with it around Leicester.