If you weren't using CMSS3D, the sound quality wouldn't take a dive, but then again both CMSS3D and DH do it to the sound, it just feels awfully artificial IMO.
I don't really like the STX sound, too harsh and treble happy for me, while the Titanium HD is more neutral with a gentle warmth to it, and since I prefer warmer over colder/brighter, the choice is easy.
I do understand what you mean about the control panel, but my quarrel with it is more it being bloat rather than unusable. It's no Audigy or SB Live! control panel, but still usable.
About switching modes, ever since both a third party and Creative down the line made available an auto mode switcher, that's not much of a concern, especially if you have the exact settings you like on each mode.
If Creative had the entire feature set configuration available to Creative Audio Control Panel rather than the Console Launcher, I'd be a happy man, as the former is straight to the point without visual fluff while the latter has more eye candy.
Artificial's a great way to describe both of them. I'm ok w/ DH for movies, but not for games.
Interesting about the Tit HD being warmer...I tried to grab one from BB when it was $50, but missed out.
The Creative software needs a one stop shop and the mode switching needs to go, lol! When that happens, I'll try it out again.
What headphones are you coming from?