The Ultimate SU900 will utilize a brand new SMI 2258 controller with capacities starting at 256 GB for 109 Euros. Sequential read and write rates cap out at 560 MB/s and 525 MB/s, respectively.
http://www.notebookcheck.net/ADATA-announces-2-TB-Ultimate-SU900-3D-NAND-MLC-SSD.187891.0.html