This post is in response to the discussion around my recent Easy Tier performance post.
Now updated to include SPC-1/E results (now that I realise it is the same workload as SPC-1 as highlighted by Dimitris).
SPC-1 results can be seen at http://www.storageperformance.org
Not all of these are latest models, but it might give some small insight into the performance of the various architectures. The Storwize V7000 is limited to 120 internal drives until March 2011, so the SPC-1 was submitted with an external DS5020 attached to provide extra drives. The DS8700 result shows the effects of Easy Tier with SATA RAID10.