I think you are in for a disappointment Not sure how good the sound stage is on those headphones. hehe sorry a funny analogy just crossed my mind there. I have just convinced a man of the advantages of mobile phones but he has only access to two cans on a piece of string
PLease try out a few games, try setting the sound to headphone out and then try setting to 5.1 and see which gives you the best result. Don't set the game to stereo, set it to headphones or 5.1.
But as I said, the headphones aren't the best. Your tritons will probably sound way better!!
Tried Bioshock a short while ago, love the sound on that. Set to stereo and not 5.1 though with windows also on stereo. Sounds good to me, not sure which I prefer out of them and the Tritons TBH, need to do a direct comparison.
Not sure why you would set to 5.1 when only the stereo jack is being used with stereo headphones, can you elaborate on this please?