What most people do not know:
The Alphalink is not just an AD/DA converter.
As a nice extra you get also an ADAT/MADI converter.
This means the unit can either be an 24ch AD/AD to ADAT or - if connected to MADI- add the 3 ADAT streams on top to the AD/DA streams. In other words: 48 channels in one box!!!
Don't throw away your existing ADAT based converters. You can add them to the Alphalink and raise your i/o channel count.
If I didn't had one already I probably would buy it. 8)