Here is a good write up regarding the different types of Gore Tex.
Personally, I really dislike having to put on a rain suit over my riding suit. Usually end up getting wet because I keep hoping it is just a shower! Hopping around on one leg, under an underpass, trying to get it on over boots is just a PITA. So for me, my riding suit needs to be waterproof and again, for me, the outer shell needs to be waterproof. If you rely on the liner to provide the waterproofing, you end up with a water logged outer layer that is very heavy, takes a long time to dry, and turns into a refrigerator when it does start to dry.
So, again, for me, that means the 2 or 3 layer technology mentioned in the link above. I have a Klim Latitude suit (a 2-layer). It has been 100% waterproof in all day downpours, easy to control temperatures by layering, has adequate ventilation for up to about 80 degrees (I seldom ride above that) and good crash protection although I have not tested that aspect.
I wish I had bought the Klim suit years ago. It would have turned out to be less expensive in the long run, I would have been more comfortable, and I wouldn't have 3-4 other suits hanging in my closet, gathering dust.