I like renaissance music, too, thanks for the links! Some other recordings can be found here:
Recordings of the Choir - Coro Nostro Chamber Choir
I especially like the piece
Sicut cervus : no disturbing or dramatic effects, just pure and natural beauty...
In the 14-16th cent. life was much slower and calmer than today (no tv, net, etc...), I think that's why they can write such beautiful music.