Best tools for data migrations to Isilon?

All,

I'd love to know what tools are used most successfully for data migrations from specific sources? Less a question and more about collaboration and logging of what is used, how it was used, where the challenges are, etc...

From my understanding tools available and commonly used are:

Rsync

EMcopy / RoboCopy

isi_vol_copy (NTAP migrations and now VNX)

Cloud Tiering Appliance (CTA)?

NDMP

Isilon Configuration Backup and Restore Toolkit

Please log tools you've seen success with specific to Win File systems, Unix, Specific vendors, etc...