I was thinking of buying an iMac 27" 5K, especially if it got updated yesterday. However, not only did it not get updated but the prices massively jumped in the UK. I wanted a fusion drive at least, and that model has gone up approx. £300. Even the refurb models have jumped by 20%. I wanted to ask what people think of the 21.5" 4K model. Does it suffer from having the integrated graphics with 4K of pixels to drive? Also is the fusion drive on the 4K worth £90. Is it a 24GB or a 128GB card? I might buy the basic machine and then add a 512GB Thunderbolt SSD.