I went with the Fusion drive for my order. I am currently using a 2011 iMac with 128GB SSD + 1TB HD (this was before they introduced the fusion drive). I love the combination of storage and speed. I think it's the best of both worlds (all my apps are on the SSD and docs on the HDD). Also, I barely notice the noise coming from my HD. Hopefully the new fusion drive (with the PCIe connection) will be even better.