I have a Ensoniq 1371 I bought on ebay a long time ago for like 10 bucks, but I can't find drivers for it. I don't want to spend very much, maybe 30 or 40 dollars tops for a used one. My biggest concern is low latency. I do a little music composing with my MIDI keyboard controller, and I'd like to be able to hear the sound come out of my sound card the instant I press a key on my keyboard instead of a 90ms delay as it does with my on-board sound card now.