I'm using an ancient iMac 27" from mid-2011 and want to upgrade it by getting a fast external boot drive. What I'd like is: - Thunderbolt connection - at least 3TB of space, preferably 4TB - whole disk encrypted with Filevault - as fast as possible The options I'm considering are: 1) Akitio Neutrino Thunder D3 enclosure + Samsung EVO 850 4TB (total ~$1600 USD) 2) Akitio Thunder2 Duo Pro RAID enclosure + 2 x Crucial MX300 2TB (total ~$1400 USD) Questions: a) These are both bootable and allow for Filevault, right? (Option 2 is hardware RAID, so Filevault should not be a problem.) b) Option 2 would be faster than option 1 if used in RAID 0, but that will not allow TRIM. Is that an essential problem? c) Are there other options that I'm missing? (Changing the internal drive is not an option, for various reasons unfortunately.) Thanks for any help!