The storage market has to be the most unsettled it's been in years. The wide variety of storage vendors, with good independents is a shrinking landscape. The power plays and buy outs makes for some very careful decisions if you're about to buy storage. My short advice is be careful and if you can..wait it out.
Dell buying Compellent changes the storage playing field yet again. How it will all pan out and what will end up 'king' of the marketplace? Time will tell.