Hi all I was looking at an iMac but perhaps getting one with a standard hard drive and then using an external USB 3 connected SSD to install MacOS onto. Does anyone have any experience of how well this will work? I understand that there is a theorietical maximum throughput for USB 3 that you rarely achieve but would this impact performance significantly? The thing I appreciate most about SSDs is the reduced latency rather than the increased throughput so would USB 3 impact this to make it not worthwhile? Many thanks M.