As already stated the RAID0 array will wipe the floor with the Raptor for sustained transfers but there's life in the old dog yet. The random access time of the Raptor is still going to be a lot less than the array so in the real world which feels faster will depend on how they're being used.36gb raptor on it's own or 2x320gb 7200rpms in striped raid on ich9r.
Also is there any sense in partitioning a striped array to prevent the system partition getting cluttered?