Try and find a local shop with a saddle test library/program. Then you can try out a bunch of test saddles at minimal cost. Another tactic is too but cheap used saddles on eBay. You can often sell them for what you paid.
I agree that saddle preference is highly individual; what I love, you may hate.
To directly address the original question, I have no experience with the Vader, but a friend of mine says it's the most comfortable saddle he's ever had.