If you're using Win 2000 or XP, the RME 96/52 is probably the best ADAT I/O lightpipe card, with the most current and trouble-free windows drivers. If you're using win98SE or can use it, the Sonorus Studi/o card does 16 adat I/O, compensates for the blackface storing the data on the tape in inverted phase, and uses ASIO driver for low latency. There is a Win2K/XP driver for the Studi/o that works but not with ASIO. You could also use a MOTU 2408 or 2408 mkII and get 24 adat optical I/O and 8 analog I/O as well.