They sound exactly like the t3 ones I have just bought, t3 must be the UK version, I can't find any sedu ones online for UK. The t3 ones are made of tourmaline too and I have to say I love them, they don't snag my hair at all ! I don't think you will regret it !!
I posted this on another thread:
I just bought some, I LOVE them, they are called t3's, they cost me £97.99 online, which is about $185 USD and there are only 4 sites you should buy from so that you get the full 2 year warranty, go to
http://www.t3magic.com/ to check them out and it also tells you where you should buy from.
They are made of 100% tourmaline, they are beautiful, and I got 3 free tourmaline brushes worth about £15 each ! they work very well on my hair and I have very long hair thats naturally curly.
I used to have really cheap Remmington ones that worked really well but they wore out too quickly and damaged my hair, these t3s are supposed to be the least damaging ones out there!