While I definitely recommend going with DOSBox instead of a physical dos computer, if you are going to the latter you may want to look into the
Sound Blaster Live!. I had a Live! Value in the Windows 98/ME era and remember it coming with dos drivers letting it act as any earlier type of Sound Blaster as well as some other brands. It can do all three sound card types Kurufinwe mentions, and for some games you can even do music with one card and speech/sound effects with an "other". Very nifty.
