I wasn't a fan of the silicon tips either. They changed the sound of the W4, took away from what I consider the W4's strengths. It is a compromise, because like yourself, I really like clear and extended highs. I stopped trying to compare them to my higher end experiences because they just won't stack up, but for what paid and the value they are hard to beat.
When you compare them to your higher end experiences doesn't it just make you angry ;). That's what got me to sell my lower gear. Just was wasting my time.