mazr,
Sorry to answer a question with a question, but:
Is this a one time load, or ongoing update?
Is the CMDB already established?
AIE should be able to handle loading the data without an issue. You will want to make sure you have a separate server setup to run AIE and Recon on. The first time you run the recon, it is going to take and extremely long time to Identify and Merge those 60 million records. (Even worse if your ID activity's are really complex).
The question I would have for you is what type of system is the data existing in now and which version of CMDB are you utilizing?
Regards,
Frank