Edward is thinking about buying a 27" iMac with a fusion drive because he hears it's faster. Leo says it is, but only faster than a spinning drive. It's not faster than a solid state drive. It made a lot of sense a few years ago, but now it really doesn't because SSDs have gone down in price.
If Edward needs a large drive, it's OK, but Fusion is only slightly faster than a spinning drive. It's better to get an SSD and then add an external drive via Thunderbolt. Leo doesn't care for Fusion technology. It really doesn't give the benefits they want people to think it does.