if you can find a deal on an Apogee AD8000 with an adat card that is your best bet. They go for about 1500. I use them all the time i find them to be the best on the market.
The masterlink is the standard in nashville. I have used one about 40 times. Vary easy to work with. The only thing that could be better is having a keyboard port. As a note i have not used the analog in. just the abs/ebu.
The TDm system can read standard Wav Files without any isssue's Just make sure you do not compress the wavs in any way. also make sure you burn an iso9660 cd. You will not have any problems inporting into protools. If you have any more questions feel free to ask