After being a creative fanboy for ever since,decided to try the asus STX II after reading some good reviews about the first one,from users over the net.
compared to my previous creative ZXR which the STX II replaces,the sound is more natural,laid back,and forgiving.
 
Users can talior the sound to their preference with swappable opamp sockets.
Stock opamps are MUSES8920 for the I\V section,and MUSES8820 for the buffers.
 
Ive replaced the stock buffers opamp with Muses02and the bass is spot on,the muffled and boxy sound has gone,more upfront sound without losing space and air.(cant wait to get my Muses01 and try those babys.
 
software is the only downside of this soundcard as far as I can see,although is very usefull,its just plain ugly and looks outdated.
 
overall,I'm very happy with it,great sound and build quality,very customizable,10/10.

I've heard good thing about sennheiser,well those one are definitely  are not the one to get!!
Although the bass is great and very punchy,the high's are all messed up and very annoying,and so are the mid's.
If you gonna listen to techno,dance,trance,this are the right for you,otherwise,SKIP IT!!

The Creative X-Fi Titanium HD Is the new high-end sound card from creative,and has an impressive spec sheet like 122db in 24bit\96khz playback and using a high-grade components like Texas Instruments DAC,also it comes with a 16mb x-ram for hardware accleration in games(useless).
The EMI shield is a cheap plastic unlike ASUS metalic cover(but it takes less heat from other components unlike metal that is on the STX),and the EMI shield came scretched like some idiot at creative tried to clean it with glass paper!
Sound Stage is wider compared to an onboard realtek sound chip(alc889),with warmer and richer sound and good mid and high tones!
lows wise,the bass is good,nothing special,it could use more punch,and it could be fixed by changing the omp's as they are replaceable(it comes with generic 2114d's at the I\V section and LME49710NA in the buffers)
overall,very satisfied with the card,drivers work well under windows 7 64bit,with no problems at all,I like the warm,rich and  detailed sound of it.definitely worth the money!
 
december 2010:I was so impressed with the soundcard so I've god a nother one for my second computer that I'm gonna build,anyway I've got a rev C. of the card(first one is A)and the highs are just perfect,spot on,sound is more stable and more cleaner(or its all just in my head). 
 
 
 
 
 
if there are any grammer mistakes,please excuse me,english is not my first language!!