So I was planning on buying the new iMac but was hesitating whether to get an SSD with it or not, since I am too afraid to open it up and put one in myself, but got drawn back since the ones that Apple uses, the Toshiba HG3, is both too expensive and too slow by today's SSD standards. The good news is, though, that Toshiba just announced a couple of days ago the successors to the HG3, and I thought it was one of the reasons Apple was holding back this update:
http://www.anandtech.com/show/5912/toshiba-announces-thnsnf-series-ssds-19nm-nand-is-here
http://www.anandtech.com/show/5912/toshiba-announces-thnsnf-series-ssds-19nm-nand-is-here