Digital BW, The Print

Hi all,
very pleased with my BW results on my HP Photosmart 7960, I'm plannig 
to buy the new HP 8750 (A3+).
Where can I get informations on dye-based Ink fadding on fine Art Paper 
(Hahnemuhle)?
Do you think it's a reliable option (8750+fine Art Paper)?
Thanx