Help optimize the performance of NAS 314

I forgot another bottleneck, the client computer. Most of the laptops still have 5400RPM 2.5" HDD unless you get high end machines. Given a speed of 600Mbytes/s (I assume 4 high end disks, otherwise 400-450 will be closer to reality) on the NAS, the only machine I know could follow the pace are Macs because of their PCI-Express SSD, and even there they should use thunderbolt for network connection or a 10Gbit/s ethernet adapter. Of course custom machines with PCI-Express SSD will do the trick too or anything with at least 2 SSD in raid0.

I agree that disks are not usually a limiting factor for low end NAS, however when you begin to go with xeon CPU chances are they are. An hexacore@2Ghz will likely not be the bottleneck and they usually come bundled with 16Gb Ram and an incredible number of network cards. In this high end configuration network is still the main bottleneck but HDD are second. However I agree that the 314 is far away from having such an horsepower and is likely to not see any difference here.
I don't believe SSD will make any difference for anything less than 5xx or even 7xx series here unless you are working with a tremendous amount of small files (size in bytes or kbytes) or maybe using iSCSI for VM.