I have a SB Live! and while I can load huge soundfonts (100+ MB) into memory, it is clear while listening to some midis that only a some of the instruments loaded. I believe the SB Live! had a limit ...
I've never put much effort into getting my midi to sound good but I think it's about time. A guy at a shop recommended Gigasampler. It can play samples off your computer via midi. Isn't that exactly ...