End of the day, I would prob pick the SE's, but having said that I would not compare the Golds to the Valks - completely different if you look at each IEM in totality.
For what it's worth, the way I think about these things is to figure out what "hole" I'm trying to fill in my IEM portfolio. If you want something more balanced, analytical, detailed, etc., I would go with the Golds to be honest. Plus, the Golds will presumably cost you a few hundy less.
I'm just playing devil's advocate. Again, I think the SE's are vastly superior (and I agree with
@Rockwell75 that the SE + LX pair is excellent), again it just depends on what you're looking for. The Golds are very different from the SE, LX, and Valks...
edit - as an example, I am selling my Golds because I replaced them with the U12t's. I found that the U12t's do everything better than the Golds do (although the Golds are VERY good), and I believe the U12t's fill a void in my collection...again, just one example. i'm still pretty new at this and am learning