Happy to join the Prius family. Picked up my Prius Three earlier in the week, tinted the windows and removed the hubcaps. Also ordered a set of TRD lowering springs. Can't wait to put those in. Read some different opinions in regards to US or Euro Mud Guards, leaning towards the Euros.
I would choose against the Euro mud guards. With it lowered you will hit speed bumps and such. I would get the lower profile US ones.
Welcome aboard and enjoy the ride! I agree with exbauer, my euro ones bottom out of speed bumps and really don't do much in terms of keeping the car clean. Definitely helps in the rock ding area though.