I was so disgusted with the sound issue, but I think I have fixed it for myself. I actually missed a server page on a locked server because of the low volume.
So I now use WAV files as my ringtones. Before using Media Manager to put them on my 8830, I used Sound Recorder (which is included in Windows XP, you might have to dig to find it) and increased the volume by about 200%. If the ringer is too "music-y" then there will be noticeable distortion, but if it more of a sound than a song, it worked great.
I use a Klaxon alarm for when a server goes down, and this thing would wake the dead now. No more missed pages for me!!