If you can find the Titanium 7.1 PCI-e card anymore, it should do a fine job. All the headphones you mentioned are pretty easy to drive. Try the Samson's out first before buying more. I have the AD700, which I find very comfortable, even for long gaming sessions, after I bent the headband a bit to angle the earcups more flat against my head. I haven't heard the Sennheiser headsets myself, but after buying "better" headphones (Q701) I remain convinced that the competitive advantage cannot be improved from the AD700 with a good soundcard and surround processing. I do prefer the Q701 for music and it's awesome for gaming too, but I haven't been able to let go of the AD700 because it's nice without amping, the soundstage is so even and wide, and the headphone is really lightweight with no headband "bumps" or discomfort.
wow, thanks a lot..
yea it's the Titanium 7.1 PCI-e but there's the Sound Blaster version (the one with the closed face design), and it's said to be better, what's your opinion on that?
i will probably get AD700, cause there cant be such fuss about something for no reason..
thanks again :)