I recent;y bought a Saturn and a modchip, and now am looking for the most complete source for you know, obtainable ROMs for the Saturn, espically Japanese exclusives that go for insane ebay prices. I've tried a few torrents but they are all poorly seeded or dont contain the games I've looking for.
In particular:
Nights into Dreams
House of the Dead
Burning Rangers
Radent Silvergun (J)
Castlevania Symphony of the Night (J)
thanks everyone!
http://www.segahub.org (http://www.segahub.org) used to have lots of, but I can't access their site now... :-\ Maybe they were taken down or something.
Also, I could get you the first 3 games on your list for cheap (2-10$). Radiant Silvergun is ridiculously expensive (160$) and Castlevania ranges between 30 and 40$.
PM me if you have questions. ;)
Look here for Radiant Silvergun:
http://www.torrentz.com/3cf920be1a3e0e8c3d4dbdae90a85334ec744a47 (http://www.torrentz.com/3cf920be1a3e0e8c3d4dbdae90a85334ec744a47)
This seems well seeded.