Gortex Gen 3 is the best, yes there are versions of Gortex and if you have a light version of Gortex you may want to look into the version.

The heavier weight Gortex or Gortex Gen 3. I just checked Wiki and they don't mention the version of Gortex but when I purchased my Gortex from a man who made Gortex gear for the Special Forces he did mention generations of Gortex.

I have had good luck with most Gortex from LL Bean (insert standard disclaimer)