They all can and should be used together, apart from Atmospheric Oblivion and Audia Arcanum, as AA includes AO. However, AA also changes a lot of sounds in ways that you may not like, so in that case you can always just use AO.
For instance, I use this install order:
OSSO
MIS
AO/AA
Symphony Of Violence
Ambient Town Sounds
Storms & Sounds
This ensures that OSSO's sounds are used as a base, which is then improved upon by the other mods, with S&S last to make sure you get it's awesome thunder sounds.
EDIT: I'm going to update this list at some point with some music mods, when I get time.
Ok, thx for the information!
As I said I don't speak english very well, but please can you check the description for the sound mods? You wrote: "The next three mods can then only be used one at a time, and the same goes for the last two." so I tought that Symphony Of Violence & Ambient Town Sounds wasn't compatible togheter...
Anyway thx for this great topic!
EDIT:
Don't know if this can help you, but I use this mods for the music:
Ultimate Music Pack 1.0 - http://planetelderscrolls.gamespy.com/View.php?view=OblivionMods.Detail&id=2936
Oblivion Symphonic Variations Music Suite v. 1.0 - http://www.tesnexus.com/downloads/file.php?id=11436
Silent Tracks Expanded v. 1.0 - http://www.tesnexus.com/downloads/file.php?id=12909
EDIT 2: there are two fix for alive waters: (http://www.tesnexus.com/downloads/file.php?id=20698, http://www.tesnexus.com/downloads/file.php?id=25511).