My main interest is the preservation of media history. To that end, I am looking for a good source of PS2 files so that I can catalog and archive them into a dedicated USB HDD. Then I'll store the drive in the random nuclear fallout shelter the house I bought came with until the day the world needs a copy of 'Little Britain: The Video Game'.
Seriously, any suggestions for collections sources would be appreciated.
No one mentioned cdromance, so I'll do that. Pretty much the only source I use besides Vimm's Lair. Also, when you can, prefer US versions over EU, as the former run at 60FPS while usually EU PAL are locked at 50FPS, if I'm not mistaken.
For preservation, go with a redump pack. They aim to make a collection of "perfect checksums" of every game. Badically, multiple people will rip the same game and they post a "hash" of their file and the perfect rip is the one that matches each other. They do not share the actual files, but you can get the a pack from archive.org of iso files that match the hash database of redump. This should give you the best collection.