Would you add 50mm L if you already have 35mm L and 135mm L?

i already have 35L and 135 L (bought back from a friend).

It's funny that i used to have 50 1.4 and 85 1.8 and sold them a while ago to fund for 35mm L.

I like 35mm L in term of sharpness, color contrast and bokeh. I don't have chance to try out 50 L.

The reason i'm asking because i currently have 5DII and classic 10D as backup. I just want something useful on 10D

Thanks again.