Technically, if your main purpose is Dolby/DTS when watching movies off a DVD/Blu-Ray, then any soundcard with optical output will do.
If you want Dolby/DTS when doing other things that do not already have a Dolby/DTS track [games, for example], then you need a soundcard with either Dolby Digital Live or DTS-Connect support.
The Turtle Beach card will suffice for either purpose, though I note there are plenty of alternatives from ASUS and HT Omega at the sub $100 price point.