I think general purpose benchmarks are of little value for Premiere Pro conclusions. Consider this on two of my systems.
Here are the results of our PPBM6-DE export on the CPU only-centric MPEG2-DVD timeline. And remember the i7-980X is a much older generation.
Quad Core i7-4770K @ 4.2 GHz 635 seconds
Hex Core i7-980X @ 4.2 GHz 540 seconds
For AE you really need much more memory.
Instead of RAIDing drives consider using one 128 GB SSD for your OS/Applications and possibly one other for immediate projects and hard drives for archiving