I've been using the same ringer for years on many phones, it's my bland, generic office friendly ringer that I found on a random website a long long time ago. It sounds nice and is completely un-annoying yet classy enough you're not embarrassed if it rings in a meeting or something.
Moving to the 8320, my ringers are LOUD, I mean way above and beyond what I would call normal; my existing ringer is so loud - on Low profile setting - that my speaker crackles when it kicks in. So, time to re-encode the original AAC file as three variations:
http://rivviepop.freehostia.com/bb/index.php?path=tone/
The first ZIP is just all three ringers zipped together for easy download, or if you have problems downloading the MP3 files.
ringer1.mp3: this is the original AAC file (44Hz/48.1kbit) decoded to WAV, then encoded as a 24Hz/64kbit MP3 file. The gain is at the original 97.5%, which still crackles on my new 8320. Included as the reference baseline ringer.
ringer2.mp3: this is ringer1.mp3 with the gain adjusted to 94.5% using mp3gain (meaning no decoding, it's a direct adjustment with no loss). I still find this a bit loud and crunchy even on Low profile.
ringer3.mp3: this is ringer1.mp3 with the gain adjusted to 89% using mp3gain again. This one is now what I'm using, it sounds like what I was used to on my Pearl, Nokias, Motos, etc. When played as a regular MP3 it sounds muted in comparison to ringer1 and ringer2, but as a ringtone it comes out sounding just fine.
Gain adjustment on all files was done with clipping protection, so the crackling you might here on ringer1 or ringer2 is *not* the MP3 file, it's something with how the 8320 uses it as a ringer and whatnot. They all sound perfectly fine when played with the desktop machine or as a regular MP3 file on the device, you'll only notice the volume differences when you actually assign them as ringtones in your profile, then call yourself from another phone to test it.
have fun!