No worries. I was being sarcastic. The entire JVC XX line up is immature looking.
I can't really comment on any of the options you listed. Pretty much everything I've owned is below.
I can say that I tried the Klipsche S3, which is my most hated IEM. The cable was the worst part. Noisy, easily tangled, thin and cheap. The sound was not far behind. Little bass, shrill highs...can remember the mids. If the S4 are anything like them I recommend steering well clear.
Regarding the UE lineup...from what I've read the 600s are nice. If they are anything like the 100, 4000, or 6000, they should have a warm sound with decent mid and sub bass, slightly rolled off treble, and fairly forward but not aggressive mids. I've wanted to pick up some 600s for a while but always miss them on sale.
If you snoop around the site, you should be able to get a good impression of the other options you listed. There is lots of feedback from others MUCH more knowledgeable than I am.
Also....I think the XB50s are a good phone, they're just not for me. I like more aggressive mids and highs, which they do not deliver. They are just too smooth...