soundcard for my z5500's

[ineed2upgrade]

after a soundcard to compliment the logitec z5500 5.1 speakers i have planned for a new build.i want a creative card from good past experiences but unsure which one would be best.
pc is used for music/films/games so need to be good card

 

[ineed2upgrade]

as in ive always used creative cards and never had problems so would rather stick with a brand i trust.
i can afford to get the top x-fi card but think it will be overkill as im not going to be doing and music making,just games and playing music/movies but want a good quality product that's got really good sound quality and is adjustable

 

[ineed2upgrade]

isnt it a pain using digital 5.1 speakers with the standard x-fi extreme music/gamer?