That fact that you use headphones a lot and a 4.1 speakers setup makes the Phillips AE far less attractive. The Audigy Platinum and GTXP are really only worth it if you need all those extra connectors. They are too costly otherwise. With all that in mind, I would go with the Turtle Beach Santa Cruz. With the versajack you can have your speakers and headphones connected at the same time. As well, it has some of the highest rated sound quality around, especially for headphones and speaker setups besides the 5.1 method. It's not bad for 5.1s, the Phillips AE is just better. The drivers also seem to be very solid. It's positional audio isn't bad either.