So you want the performance of a new-fangled SSD with the extra storage of a good 'ole HDD? Apple has you covered with Fusion Drive for its new iMac. Unlike existing standalone hybrid drives the company is apparently "fusing" together a separate SSD and HDD with custom software in Mountain Lion. Better yet, the OS and all the pre-installed applications live on the SSD by default, while your documents and media reside on the HDD. This sounds similar to the software RAID functionality in OS X, bu