I like my Nextlink Bluespoon AX2. Small, light (10g), decent battery life, good sound quality. As long as you can deal with the strange way it sticks in your ear (the speaker part sticks right into your ear canal, and there's a flexible rubber thing that fits into the groove on the middle of your ear to hold the contraption in place.) Once you get that down, it's actually quite comfortable and easy to insert. Runs about $50. Takes a "micro-USB" connector (bit smaller than the now-ubiquitous mini-USB connectors.)

I don't use my headset that often (mainly just for SkypeOut to make international calls,) so being small and light are key for me so I can just toss it in my laptop bag with minimal bulk. It's not the best sound as you seem to want (no proper noise cancellation, but in a quiet environment the sound quality is quite good) but its size might fit what you're looking for if you're not trying to use it on the road.

If you want to spend 5x that, you can get the Bluespoon 5G (named for its 5g weight) that's even smaller and has horrible battery life. It comes with 4 batteries and a multiple battery charger since they don't last very long!

Edit: Hmm, the Jabra JX10 you mentioned is around 10g too (but externally noticeably bigger than the AX2), and looks to have decent active noise cancellation. Website says you can even wear it without the earclip (though I'm curious how well it'd fit like that.) I'm getting tempted by one of those now.