Compellent Data Migration to Isilon

Hello:

I have no direct Compellent knowledge and much more Isilon experience.  I am interested in the best and most efficient way to move NAS data from that old platform to a brand new Isilon.  It is my understanding there is a means to move the data from the Compellent side to Isilon using a Compellent backup facility.  Any recommendations on where to start with this would be most helpful.  If the community consensus is to steer clear of Compellent tools and use CLI tools (EMCOPY, rsync, etc), I'd like to hear that as well.

Thanks!