EqualLogic has some great mid level tier storage. We've been using it for most of our clients (after they got a large quote from EMC and NetApp) for VMware and non-vmware implementations. Built-in replication software and automatically grows to SAN by adding another tray (very easy to expand on the fly). Anyway, seems like Dell will own them now.. which makes for very interesting as Dell has been rebranding EMC for the past few years. What will happen there? Anyway, here are some news excerpts here.
http://www.dell.com/content/topics/global.aspx/corp/pressoffice/en/2007/2007_11_05_rr_000?c=us&l=en&s=corp
http://www.news.com/Dell-to-buy-storage-company-for-1.4-billion/2100-1015_3-6216992.html?tag=nefd.top