Joseph Haydn – Masses
You can preview to the album through Magnatune (use Rhythmbox if you’re on linux). Magnatune also sells them in a DRM-free FLAC (lossless)/Ogg Vorbis/MP3 formats. Also check out their J.S. Bach – Mass in B Minor.
In a related note, does anyone know where I can buy a CD of modern Mass music (in Indonesian) in Jakarta? With modern I mean, the one we usually use in sunday Masses. From all Christian songs it seems that the most common one is the hardest one to find.