When synchronizing a ton of data you don’t want to wait longer than really necessary! So I tested several suggestions found on the net and came up with the following:

rsync -aHxv --numeric-ids --delete --progress -e "ssh -T -c arcfour -o Compression=no -x" <source_dir> <user>@<dest>:<dest_dir>

This command is almost exactly what somaddict suggested on commandlinefu.com.