PROMISE EX4650 + 4x FUJITSU MBA3300RC

Conclusion

With four 15,000 RPM SAS drives, the EX4650 should no longer see any bottlenecks between itself and data.  However, we are still seeing some performance issues especially with write-heavy and calculation-heavy array types.  Perhaps spindle sync and improved firmware between the HDD, controller, or both, can improve performance without sacrificing data or array integrity. 

Nevertheless, we here are concerned about system performance, and can make do with data security through other means (ie. backup data arrays).  This combo can truly provide any power user with crazy-fast RAID-0 boot and scratch disks, plowing through any large data set such as photoshop files, video streams, or massive databases, like a hot soldering iron through toilet paper. 

So we award the Fujitsu MBA3300RC, a stellar 90%: