So I bought my iMac in January without the fusion drive, knowing I would want to upgrade my internal HD to an SSD, or manually create a fusion drive by adding a blade SSD. I'm not worried about tearing my iMac open. I was hoping a 1TB blade SSD would come along, but alas that hasn't happened, and AFAIK the biggest blade SSD available is the 256GB SSD from the rMBP. So now it's come down to what SSD looks to be the best one to upgrade to. Currently the two best on the market look to be the: Crucial M500 1TB Or the Samsung 840 evo 1TB Both are around the same price. From what I've read the samsung appears to be faster but the M500 more robust. Are there any expectations for new 1TB SSDs to come along at the same price point that might be faster/more reliable/better in the near future? Or alternatively a much larger blade SSD (even 512GB would suffice) this way you get the advantage of 1. using all available space in the iMac and 2. Gaining the extra room from having the Hard Drive still in the iMac? I'm not looking to buy right away, but probably in the next 2 months pending funding/deals.