It all depends on what you shoot most. If you shoot landscapes and architecture primarily, then a slightly wide angle of the 135 would be preferred. If you shoot a mix of subjects and portraiture, the 150 may be more versitile.
BTW: the big kid in my avatar is my hero, my son, who proudly serves us in the Navy. "SALUTE"
As Rick said above. 135 is in the middle of the focal length range for 4x5 cameras. It's a slightly wide normal. You have plenty of room on either side for a shorter or longer addition to your kit when you feel the need. I prefer a 150, but only because I have a 120 and a 210. A 135 would be a bit redundant for me. You may choose to go with a 90 and 180 as additional lenses. It's nice to have choices.
With that spread I'd keep the 150 and sell the 135 and the 180. But what I would really do is very careful testing on all the lenes and see what ones are really sharp. Then cul from the sharpnest list. Depending on how that shakes out you might have a standard 90-150-210-305 group or a 135-180-250.