You have not mentioned a budget. Most serious amateur and professional composers tend to use Terratec, though some use the high-end versions of Creative Audigy cards. The former is biased towards your side of the market, while the upper end of Creative's range has loads of bells and whistles to accomodate a variety of demands, not least gaming. On a stricter budget, the clear choice is M-Audio. Excellent quality chipset, often described as being almost as good as Terratec, but cheaper. A good no-frills M-Audio card can be found for less than £100.