Both the DT990 and Q701 are more immersive than the Sennheisers. I personally prefer the Q701 to the DT990, and you can read why here > http://www.head-fi.org/t/592630/akg-q701-vs-dt990-600-ohm-comparison-review
The DT990 is just sort of an extreme "flavor" (V-shaped, lots of treble), so just make sure that's what you want before you go for it. I actually find the Q701 more immersive, as it sounds less exaggerated and more realistic, while still having some fun bass and body like the DT990. DT990 is sort of like watching a TV with the sharpness and color turned all the way up like they have them in the store (torch mode).
EDIT: I see you said the DT990 PRO. Haven't heard that, but MLE described the differences on the first page already.
Edited by chicolom - 8/23/12 at 4:38pm