Good god, you people have WAY too many mp3s.
As for myself, I usually keep around a healthy 150-200 mp3s on my comp at any one time. Even then, I don't ever listen to half of them. Bitrate is the normal 128, because to a normal listener such as myself, 128 is no different than 160+. And I use the new WinAMP 5.0. Great stuff.