I opt for midi drum tracks instead of audios for this reason: Listen to Roland midi drum sets, e.g. the following (watch the demo movie):
http://www.roland.com/V-Drums/lineup/portable.html

What you hear is actually midi drums of course, because every time the drummer hits a pad of this drum set, a single one-note sample is triggered via midi, so this is actually how realistically midi drum tracks can be created. Does it sound unrealistic in any way?