I am currently working on an SMB design which will probably include a Dell/Equallogic PS5000E unit. As this unit works with 7200rpm SATA disks it will be interesting to see if the performance is on par with all the metrics that we collected.
If it works like we have calculated that it will it could make the cornerstone of a very nice standardized SMB virtualization design.
Storage network switching will be done by Cisco 3750 switches as they are proven technology. In the ideal world it would be nice to have a side by side comparison of 3750′s with cheaper alternatives like the PowerConnect 6224 or comparable ProCurve’s but for now the 3750′s will do nicely.