To create consistent mount points, when plugging in external drives, you can create fstab rules, that use the UUID of the partition, rather than the device node, ie: /dev/sdx.
For consistent naming of the device node, you would need to create/modify the udev rules for that device, and force it to use the required name for the device/s.
http://wiki.debian.org/udev is a link from the Debian wiki, specifically the "Persistent Device name" section..