Hi I return to a dilemma that I posted 6+ months ago for improving my 2011 mini. I bought a 250gb 840 Evo for it but put that in my laptop after reading on this forum that it was not the SSD to use with an HDD as it was in itself a quasi fusion drive and that the 840 Pro was the SSD of choice. But now we have the 850 out so is that a better choice and if so, why? Onto the HDD. I'm looking to replace the stock 500gb HDD for something bigger like http://www.amazon.co.uk/dp/B00B4QESVQ/ref=wl_it_dp_o_pd_nS_ttl?_encoding=UTF8&colid=10XG2Q9KH67KQ&coliid=I2NYZEJGHJ2DU which has a greater capacity and is 7200rpm or http://www.amazon.co.uk/dp/B00I8O6O...lid=10XG2Q9KH67KQ&coliid=I1VEGQ92HXLNE2&psc=1 which has huge capacity at a slower speed. I back up to a 3tb WD MyCloud external hard drive. RAM is 8gb of Crucial. Main uses photo and video editing, web browsing and music storage (320gb). Constructive comments would be much appreciated.