As there is no sort criteria by amplifier brand or type, i started overwriting the Author's Tag with the Amplifier name or type, and guess what, that works pretty well for me. It's a nice feature to browse through all the Fender, Marshall, Mesas or whatever and makes comparison a lot easyier.
Takes a little time but makes choices easier for me!
Take a backup before changing tags.
Greets,
reznor