You realy need to get yourself some decent headphones or monitors!

For a soundcard I only use a creative Soundblaster Audigy 4.
Just make sure all the enhancments are turned off. Although I wouldn't recommend it
Not from what i've read, but it's good for gaming.

http://www.fileden.com/files/2008/5/...0to%20walk.rns

Tell me what samples/patches your missing and i'll check refill there from.