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.
Updating the firmware on the 6000 series arrays can be tricky, but it all starts with getting hold of the correct tools and the prescribed guidance. This post points you in the right direction.