Since you are interested in Belshazzar (complete opera recorded in 2008) BLU-RAY, here is a list of other items that you may find interesting.
Admeto (complete opera recorded in 2006) BLU-RAY
Handel-Festival Halle / Matthias Rexroth / Romelia Lichtenstein / Mechthild Bach / Howard Arman (conductor)
[ Arthaus Blu-Ray / Blu-ray Disc - released 20/Apr/2009 ]
Blu-Ray - Axel Köhler, the celebrated counter-tenor who is active in Munich, Halle and Berlin - now also well known for his work as a director - has brought 'Admeto' into the modern era.
Opera, Ballet & Theatre: The Blu-ray Experience II
Various singers, dancers and actors
[ Opus Arte BLU-RAY / Blu-ray Disc - released 1/Dec/2010 ]
The Blu-ray Experience II: Opera, Ballet & Theatre includes opera, ballet and theatre highlights from the Opus Arte catalogue, and gives everyone the opportunity to experience the stunning quality of High Definition picture and sound.
Tamerlano (complete opera recorded in 2008) BLU-RAY
Teatro Real Madrid / Placido Domingo / Monica Bacelli / Ingela Bohlin / Sara Mingardo / Paul McCreesh (conductor)
[ Opus Arte Blu-Ray / 2 Blu-ray Disc - released 20/Apr/2009 ]
G - "The opera is one of Handel's greatest, reaching a powerful climax in Bajazet's suicide scene. Here Domingo, even with his now diminished vocal resources, puts some of his Baroque specialist colleagues to shame with the psychological penetration...